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4UR Ranch
A historic guest ranch near Creede at the old Wagon Wheel Gap hot springs, offering natural hot springs and a geothermally heated pool to its guests. Stays are packaged with fly fishing, riding and children's programs. There is no public day access.
Agua Caliente County Park
A San Diego County camping park surrounded by Anza-Borrego Desert State Park, with three geothermally heated mineral pools: an indoor pool with age limits, an outdoor pool and a children's pool. The park is open from Labor Day weekend to Memorial Day and offers hookup sites, tent sites and seven cabins. Non-campers can use the pools for a small per-person fee.
Alameda's Hot Springs Retreat
A 1930s spa-motel in the town of Hot Springs whose suites have private in-room hot mineral baths, kitchens and sun porches. Soaking is for overnight guests only, and the retreat says outdoor soaking is not currently available on site. Same-day bookings are taken by phone rather than online.
Alvord Hot Springs
A privately owned soaking site on the east side of Steens Mountain at the edge of the Alvord Desert, with twin concrete pools fed by spring water that surfaces around 170°F. Caretakers run bunkhouses, campsites and a small general store, and a private road gives guests access to the playa. Overnight guests can soak at any hour; day visitors must call ahead.
Antero Hot Springs Cabins
Three rental cabins on Chalk Creek, each paired with its own hand-built private soaking pool fed by an on-site hot spring. There are no day passes; soaking comes with an overnight stay. The cabins sit between Mount Antero and Mount Princeton, about 15 minutes from Buena Vista.
Aqua Soleil Hotel & Mineral Water Pool
A hotel on Palm Drive with a large mineral water pool at about 88F and two jetted mineral pools at about 102F and 104F. The pools are for registered guests, who may bring up to four day guests. Dogs are allowed for a fee.
Arizona Hot Spring
Spring-fed pools in a narrow canyon above the Colorado River in Lake Mead National Recreation Area, a few miles south of Hoover Dam. The Park Service rates the 5-mile round-trip hike very strenuous, with scrambling and a 20-ft ladder, and closes the trail every year from May 15 to September 30 because of heat. The spring water runs about 111-120°F.
Arlington Resort Hotel & Spa (Thermal Bathhouse)
A historic hotel at the north end of Bathhouse Row with a Thermal Bathhouse on the third floor, where park spring water is piped into private baths. The one-hour Thermal Mineral Bath includes a dry sauna and wraps, and packages add massage or facials. The hotel also has cascading outdoor pools for guests from March through October.
Astoria Hot Springs
A nonprofit hot springs park on the Snake River south of Jackson, run by Astoria Park Conservancy, with four flow-through soaking pools at 100-104°F plus a chlorinated children's pool and a cold plunge. Visits are booked in 1 hour 45 minute sessions of up to 70 guests, and it is closed Wednesdays for cleaning.
Atlanta Hot Springs
A natural hot spring near the historic mining town of Atlanta at the head of the Middle Fork Boise River, about 60 miles of mostly dirt Forest Service road from Idaho City. The Forest Service names it, with Powerplant and Chattanooga, among the natural hot springs near its Atlanta Guard Station rental cabin. NOAA lists the source at about 140F.
Avalanche Ranch Cabins & Hot Springs
A cabin ranch in the Crystal River Valley south of Carbondale with three tiered natural pools, the largest fed by a small waterfall in front of a rock grotto. Day visitors book 4-hour slots in advance, while cabin and wagon guests have round-the-clock access. Pools are drained and cleaned every Wednesday.
Avila Hot Springs
A historic hot springs on Avila Beach Drive, two miles from the beach, where oil drillers struck an artesian hot well in 1907. Its 20-by-20-foot mineral soaking pool is about 2 feet deep and kept near 104F, beside a large heated freshwater pool with double slides. Day passes cover both pools, and the site also offers tent and RV camping.
Azure Palm Hot Springs Resort & Day Spa Oasis
A resort and day spa with a 100 by 40 ft mineral pool and four indoor and outdoor hot spas kept at about 99-104F. The Oasis Day Pass covers the pools, sauna, lounging areas and yoga studio from 9am to 7pm. Guests must be 17 or older.
Bagby Hot Springs
Rustic bathhouses with hand-filled cedar log tubs in the Mt. Hood National Forest, reached by a 1.4-mile trail through old growth along the Hot Springs Fork of the Collawash River. Bagby Preservation runs the site under a Forest Service permit and charges $5 per person. Tubs are first come, first served, and weekend waits can be long.
Baker Hot Springs
Three small concrete tubs in Utah's West Desert northwest of Delta, fed by springs at Fumarole Butte that emerge at about 180°F. Visitors mix in cold water through PVC pipes to set the temperature, and each tub fits only a few people. It is free.
Banbury Hot Springs
A century-old resort on the Snake River near Buhl with a large geothermal swimming pool, adjusted seasonally from about 89F in summer to about 102-104F in winter. Five private hot tubs overlooking the river are booked in 90-minute sessions. The site also has a campground and a dry Queen Cabin.
Barth Hot Springs
A riverside hot spring on the Wild and Scenic Main Salmon River in the Frank Church-River of No Return Wilderness, reached only by boat on a multi-day float. The Forest Service calls it the only hot spring on the river and asks boaters not to camp or stop for lunch there. Soap and nudity are not allowed, and the rocks on the short climb up are loose and wet.
Bashford's Hot Mineral Spa
A seasonal RV park near Niland with six mineral baths, a heated pool and a heated jacuzzi. Its website lists day use at $15 per person from 10am to 4pm and an Oct 15 to May 15 season, but the rates page carries a 2014 date.
Basin Creek Hot Springs
Hot springs near Basin Creek and Basin Creek Campground on Highway 75 east of Stanley; the Stanley-Sawtooth Chamber lists both the campground spring and Basin Creek (Cove/Kem) springs among the area's soakable sites.
Baumgartner Hot Springs
A concrete soaking pool fed by hot spring water inside Baumgartner Campground, on the South Fork Boise River east of Featherville in the Sawtooth National Forest. The Forest Service gives the water as 98-111°F, and the pool is drained nightly. Swimsuits are required, and soap, alcohol, glass and pets are not allowed at the pool.
Bear River Hot Springs
Formerly Riverdale Resort, this family hot springs about five miles north of Preston has four pools. The Hot Tub runs about 105F and the 3.5-ft-deep Peanut Pool 85-95F year-round, while two Hydrotube slides and a Junior Olympic pool open Memorial Day to Labor Day. Lodging includes eight hotel rooms, three cabins, a condo and RV and tent sites.
Belknap Hot Springs Lodge & Gardens
A lodge on the McKenzie River with two hot spring soaking pools, gardens, cabins and tent and RV sites. Walk-in visitors pay $12 for one hour in the lower pool; the upper pool is reserved for overnight guests. Children under 5 are not allowed in the pool area.
Belmont Hot Springs RV Park
An RV park near Garland in Box Elder County built around two natural hot spring lakes, listed at 97°F and 104°F and also known as Udy Hot Springs. A hot springs access pass is sold to non-campers, and scuba diving is offered October through May by reservation. Pets are welcome in the park but not in the springs.
Benton Hot Springs (The Inn at Benton Hot Springs)
A historic ranch and inn in the old mining town of Benton, where spring water rising at about 140°F feeds private hot tubs at numbered campsites, Inn tubs and rental houses. Every tub is booked overnight; the inn offers no day use or hourly rentals. Tub sites take tents or RVs without hookups, and clothing is optional at the sites with discretion required.
Berkeley Springs State Park
A small state park in the middle of Berkeley Springs where warm springs rise at a constant 74.3°F. The Old Roman Bathhouse and the Main Bathhouse rent private walk-in Roman baths and jetted whirlpool baths filled with spring water heated to 102°F, alongside massage and sauna services. The spring runs are free to wade in year-round, and a spring-filled outdoor pool opens in summer.
Beverly Hot Springs
A Koreatown bathhouse that describes its water as 100% natural mineral hot spring water. Admission covers gender-separated hot pools, cold plunges, steam rooms and dry saunas for up to two hours, with massage and facials sold separately. A co-ed pool is listed as coming soon.
Big Caliente Hot Springs
A day-use hot spring in the Upper Santa Ynez area of Los Padres National Forest, and the only spring on the forest modified with a small concrete retention structure. It sits beside the Big Caliente Picnic Area at the end of a long dirt-road drive from San Marcos Pass. The picnic area is closed under a storm-damage order through September 15, 2027.
Bigelow (Deer Creek) Hot Springs
A single warm pool beside the McKenzie River just off Hwy 126 near Belknap, partly sheltered by a rock overhang. It is free, and it disappears under the river when flows are high, so late summer is the most reliable time. There are no facilities.
Black Rock Hot Springs
A small group of springs bubbling up along the Rio Grande in the gorge north of Taos, captured into one soaking pool whose depth changes with the river level. State tourism describes it as well known, easy to reach and often busy, and reached by a short walk downstream from parking across the John Dunn Bridge.
Blackstone Hotsprings
A remodeled motor court in the T or C hot springs district whose TV-themed rooms each have an in-room hot spring tub. Walk-in bathers can book three private outdoor baths or the Wet Room, a large indoor pool with a geothermal steam room and waterfall, in 45-minute sessions. Baths are for ages 12 and up, and pets are not allowed.
Boat Box Hot Springs
A single old mining cauldron beside the Salmon River, filled by piped spring water, about three and a half miles from Stanley on Highway 75. It fits three or four people, and a bucket is usually left for adding cold river water. The roadside pull-off holds only two or three cars.
Boiling Springs
A geothermal area on the Middle Fork Payette River about 24 miles north of Crouch on Forest Road 698, next to a Forest Service campground and the rentable Boiling Springs Cabin. Recreation.gov describes soaking in the hot springs beside the cabin, and the USFS says the springs are a short walk from the trailhead parking. The main spring is near boiling, so test the water before getting in.
Bonneville Hot Springs
A hot springs soaking pool a quarter mile by trail from the Forest Service's Bonneville Campground at milepost 91.5 on Highway 21, northeast of Lowman. The campground season runs end of May to end of September, after which it is open to dispersed camping until snow. The Warm Springs Guard Station rental cabin also has a trail to the springs, used on skis and snowshoes in winter.
Bonneville Hot Springs Resort & Spa
A Columbia River Gorge resort in North Bonneville with an indoor mineral-fed pool and hot tub, an outdoor hot tub, cold plunges and a sauna. Non-guests can buy one- or two-hour passes online or at the door, and the spa offers mineral baths in a shared bathhouse with private partitions. Some guest rooms have private hot tubs filled with untreated spring water.
Boulder Hot Springs Inn, Spa & Retreat Center
A historic inn and retreat center 3 miles from Boulder in the Elkhorn Mountain foothills, run as an alcohol-, drug- and smoke-free property. Day passes cover an outdoor pool kept at about 96-100F and indoor plunges and steam rooms, with separate women-only and co-ed sides. The indoor hot plunges are continuous-flow without harsh chemicals, while the outdoor pool uses bromine.
Box Canyon Lodge & Hot Springs
A small historic lodge near Box Cañon Falls in Ouray where spring water from the hillside fills seven red-cedar soaking tubs before draining to the Uncompahgre River. The tubs are presented as an amenity for lodge guests. The property dates back to a 1920s sanitarium.
Bozeman Hot Springs
A large soaking complex 8 miles west of Bozeman on US 191 with 12 indoor and outdoor pools from about 57F to 106F, plus a dry sauna and steam room. The indoor pools are drained nightly without chlorine; the three main outdoor pools are chlorinated. It closes from Friday sundown to Saturday sundown and does not sell or allow alcohol.
Breitenbush Hot Springs
An off-grid retreat center in the Willamette National Forest east of Detroit, with meadow pools, spiral tubs and a sauna fed by hot springs. Day passes run 9am to 6pm and often sell out weeks ahead; overnight guests get meals and 24-hour soaking. The property is substance-free, fragrance-free and has no cell service.
Broadwater Hot Springs & Fitness
Helena's hot springs pool and fitness center on US 12 west of town, on a site used since 1889. A single-use pass covers five hot pools, two cool contrast pools, a sauna, a steam room and the gym, with The Springs Taproom & Grill serving poolside. The pools are lightly chlorinated as the city requires and drained and cleaned weekly.
Buckeye Hot Springs
Undeveloped pools beside Buckeye Creek in the Humboldt-Toiyabe National Forest, about 10 miles from Bridgeport and just east of Buckeye Campground. The Forest Service says the 140°F spring spills over a rock overhang into a cave-like pool, with a smaller spring upstream. A 2022 project added a vault toilet, a formal parking area, a single trail to the pools and interpretive signs.
Buckstaff Bathhouse
A traditional bathhouse on Bathhouse Row that has offered baths continuously since 1912, with thermal water piped in from the park's springs. The classic package moves guests through a private whirlpool tub, sitz tub, steam cabinet and hot packs, with an optional short massage. Baths are walk-in only, and men and women are served on separate floors.
Burgdorf Hot Springs
A historic off-grid resort in the Payette National Forest, about 30 miles north of McCall on Warren Wagon Road, with three log-sided, gravel-bottomed pools. Day soaks are booked in two-hour blocks, and the rustic cabins have no electricity or plumbing. In winter the road becomes a groomed snowmobile trail, so guests arrive by snowmobile or tracked vehicle.
Caliente Springs Resort
A 55-and-over RV resort on Dillon Road with natural hot mineral pools and spas, including a tub at about 104F, plus a sauna. The source water rises at 115-146F. The pools are for resort guests, and no day pass is published.
Calistoga Motor Lodge and Spa
A retro-styled motor lodge at the north end of Lincoln Avenue, now part of JdV by Hyatt, with outdoor pools and a hot tub filled with mineral water from Calistoga's geothermal springs. MoonAcre Spa on site offers mud baths and massage. Day passes are sold through ResortPass.
Calistoga Spa Hot Springs
A downtown Calistoga resort built around four outdoor pools filled with geothermal mineral water from a well beneath the property, ranging from about 80 to 104°F. The covered, jetted octagonal Jet Pool is adults only. Pools are for room guests and people booking spa treatments, which include traditional volcanic ash mud baths.
Carson Hot Springs
A historic hot springs on the east side of Carson City, run as a resort since the 1880s, with four outdoor pools and hot tubs at 98-104°F and nine private indoor pools. The 121°F mineral water flows through the pools with no chemicals or city water added, and every pool is drained and refilled daily. Admission is sold in 2-hour blocks without reservations, and a restaurant and brewery share the property.
Carson Hot Springs Resort
A long-running mineral springs resort on the Wind River at Carson, where the historic bathhouse offers soaks in clawfoot tubs of unchlorinated mineral water followed by a wrap. A chlorinated 104°F therapy pool with a small cold plunge is sold as a two-hour day pass, and all soaking areas are for adults 18 and older. The property also has hotel rooms, an 18-hole golf course and a clubhouse restaurant.
Castle Hot Springs
An adults-only, all-inclusive resort in the desert foothills northwest of Phoenix, reached by a 7-mile dirt road. Three natural-floored spring pools step down from the source at about 104-108°F, 98-102°F and 75-90°F, the last a 9-ft-deep swimming hole. The springs and spa are for registered overnight guests only, and swimwear is required.
Catalina Spa & RV Resort
A gated RV resort with odorless hot mineral pools and hot tubs across five swimming areas at its Lower and Upper Clubhouses. RV sites start at $45 a night. The pools are for registered guests, and an ADA pool lift is available.
Challis Hot Springs
A hot springs unit of Land of the Yankee Fork State Park near Challis, beside the Salmon River, with a 100 x 30 ft warm pool and a smaller pool kept near 105F. Day use is $10 per person, with children 5 and under free. A 68-site state campground is on the same property.
Charles Motel & Hotsprings
A historic downtown motel and bathhouse with individual deco-tiled meditation tubs and a larger indoor group tub, all drained and cleaned between users. Mineral water comes from the property's wells at about 111°F, and cool water is available to adjust it. Walk-ins pay by the hour and motel guests use the meditation tubs free; the rooftop tubs are closed for renovation.
Charlotte Hot Springs & Botanical Gardens
A small family-run hot springs west of Buena Vista that opened to the public in 2024 after decades of planning by the Merrifield family. It has three outdoor pools set among botanical gardens and geothermally heated greenhouses. Current prices and booking rules were not posted online, so call ahead.
Chattanooga Hot Springs
A natural hot spring near Atlanta, the old mining town at the head of the Middle Fork Boise River, reached by about 60 miles of mostly dirt Forest Service roads from Idaho City. The Forest Service lists it among the natural hot springs near its Atlanta Guard Station rental cabin. No agency source gives its temperature or layout.
Chena Hot Springs Resort
A year-round resort at the end of Chena Hot Springs Road northeast of Fairbanks, built around an outdoor hot springs lake of about 106°F that is open only to guests 18 and over. The Pool House also has an indoor family pool and indoor and outdoor hot tubs, and day passes need no hotel stay. The resort has lodge rooms, cabins, summer camping and the Aurora Ice Museum.
Chico Hot Springs Resort & Day Spa
A historic resort in Paradise Valley whose main lodge opened in 1900, about 23 miles south of Livingston on US 89. Two open-air mineral pools average about 96F (large pool) and 103F (small pool), with no added chemicals. Day passes are sold alongside lodge rooms, cabins, a dining room, saloon and day spa.
Chief Shakes Hot Springs
Two Forest Service-maintained tubs, one open and one enclosed, up a slough off the Stikine River on the mainland near Wrangell. They are free and first-come, and visitors arrive by jet boat or floatplane charter. Most Stikine River tour operators will stop here on request.
Chinati Hot Springs
A remote cabin retreat on warm mineral springs near Ruidosa in the Chihuahuan Desert, once owned by artist Donald Judd. Soaking is for overnight guests only, in outdoor hot and cool pools and private tubs at some cabins. There is no Wi-Fi or cell service, and guests bring their own food because the nearest store is in Presidio, about an hour away.
Conundrum Hot Springs
High-elevation backcountry pools in the Maroon Bells-Snowmass Wilderness, about 8.5 miles one way from the Conundrum Creek trailhead near Aspen. Camping anywhere in the zone requires an advance Recreation.gov permit and use of your reserved site, and dogs are not allowed. Bear canisters are mandatory overnight, and the Forest Service asks visitors to pack out human waste.
Cottonwood Hot Springs Inn & Spa
A rustic inn west of Buena Vista with soaking tubs fed by artesian hot springs, a river cold plunge and a dry sauna. Day soaks are walk-in friendly and swimsuits are required. Lodge rooms and cabins include soaking access.
Cove Warm Springs Pool
A 60 by 65 foot concrete swimming pool in the town of Cove, filled with about 86F mineral water from a spring flowing 110 gallons per minute. It has run for more than 75 years and has picnic grounds and a playground. Groups can reserve it by phone.
Crystal Crane Hot Springs
A high-desert resort on Highway 78 east of Burns built around an open-air hot springs pond of about 9,700 square feet that averages 101°F and is about 5 feet deep in the center. Cedar-enclosed private tubs with adjustable natural hot water taps are also available. Lodging ranges from cabins and suites to teepees, a sheepherder's wagon, RV sites and dry camping.
Crystal Hot Springs
A long-running pool complex in Honeyville, opened as Madsen Hot Springs in 1901, that blends a 120-134°F hot spring with a cold spring less than 50 feet away. It has three mineral hot tubs, a soaker/cave pool, a chlorinated lap pool, an Olympic pool and two water slides. Camping is no longer offered and outside food is not allowed.
Dakota Hot Springs
A naturally flowing, unchlorinated geothermal pool west of Penrose that is swimsuit-optional most days and describes itself as family-friendly. Visits are booked online in two 5-hour sessions, and it is closed Mondays for cleaning. Tent sites and camper rentals are available to soakers.
David Walley's Resort
A Holiday Inn Club Vacations resort at the foot of the Sierra Nevada, 1.5 miles from Genoa, on a hot springs site developed in the 1860s. Day visitors pay one fee for the mineral spas (98-104°F), a geothermally heated swimming pool, steam rooms and dry saunas. Lodging ranges from studios to three-bedroom cottages, and the 1862 Restaurant & Saloon is on site.
Death Valley Hot Springs
A Tecopa Hot Springs Road resort with a large outdoor geothermal pool ringed by four smaller hot pools of different sizes and temperatures. Four private pools with their own showers are also offered, and everyone on the property needs a $35 guest pass, valid 9am-10pm. Lodging is in bungalows, with an RV park and tent sites.
Deep Creek Hot Springs
Natural hot pools along Deep Creek in the San Bernardino National Forest, reached by a 2.5-mile, roughly 950-foot descent via the Bowen Ranch route or a 6-mile hike on the Pacific Crest Trail. Overnight camping and campfires are banned, and visitors must pack out all trash. The Forest Service warns the pools can carry a rare, sometimes fatal amoeba, so do not drink the water or put your head under.
Deer Valley Hot Springs Ranch
A cabin and lodge ranch in Chalk Creek Canyon whose pool and hot tubs are filled with hot spring water and treated for cleanliness. The pools are for ranch guests and open 9 am to 9 pm year-round, closing early on Mondays for cleaning. Sport courts and trails are on the property.
Desert Hot Springs Spa Hotel
A mid-century hotel on Palm Drive, operating since 1950, built around a courtyard of natural hot mineral pools. It sells pool day passes for 9am-8pm and runs a cafe, bar and spa on site. The hotel's day-pass page and its FAQ disagree on price and minimum age, so confirm before visiting.
Desert Reef Hot Springs
An adults-only, suits-optional geothermal soaking spot in the high desert near Florence, with overnight stays in vintage Airstreams, tiny homes or van campsites. Swimsuits are required on Friday daytimes, and some hours are reserved for members. It was temporarily closed for day soaks at time of check (Oct 19-Nov 10, 2026).
Downata Hot Springs
A family resort south of Downey built around a 112F spring that gravity-feeds a 1929 flow-through recreation pool and separate unchlorinated hot soaking pools. Summer adds water slides, a hot tub and a water playground. Lodging ranges from yurts and cabins to large houses and a campground.
Dr. Wilkinson's Backyard Resort & Mineral Springs
Calistoga's resort and spa running since 1952 on Lincoln Avenue, with three geothermal mineral pools, one indoor and two outdoor, set at about 85, 95 and 104°F. The 104°F Hot Spring is adults only. Day visitors can buy pool passes, daybeds and cabanas through ResortPass, and the spa still offers its original mud bath, The Works.
Drakesbad Guest Ranch
A historic guest ranch in Warner Valley in the southeast corner of Lassen Volcanic National Park, reached by a partly gravel road from Chester. Guests stay in lodge rooms, cabins or bungalows with all meals included, and guided rides go to Boiling Springs Lake and Devils Kitchen. The ranch's pool has not reopened since the 2021 Dixie Fire, and the operator says it is still in the planning stages.
Dunton Hot Springs
A restored 19th-century mining town in the San Juan Mountains turned into a small luxury retreat with 14 cabins. Guests share a historic bathhouse and outdoor pools fed by natural hot springs, with daily slots for private bathhouse use. It is open year-round to overnight guests only.
Durango Hot Springs Resort + Spa
The former Trimble Hot Springs north of Durango, rebuilt under new owners since 2019, now has 32 mineral pools (13 adults-only), two cold plunges, a lap-size swimming pool and private ofuro tubs. Soaks are booked in 2- or 3-hour sessions. On-site lodging was listed as unavailable at time of check.
Durfee Hot Springs
A small family-run spring pool on the north edge of Almo, near City of Rocks National Reserve. Durfee descendants reopened the early-1900s pool in 2005; there is a hot tub, a swimming pool and a kiddie pool with continuously flowing, chemical-free water. Hours are limited and seasonal.
Easley Hot Springs
A historic swimming pool and two hot tubs fed by gravity from a natural hot spring, on Sawtooth National Forest land north of Ketchum. The pool is about 85°F, and the venue describes it as chlorine-free. It runs in summer under a Forest Service permit, operated by Cathedral Pines Baptist Camp.
East Lake Hot Springs
Geothermal seeps along the southeast shore of East Lake in the Newberry Caldera, where visitors have built low rock walls to hold soaking water. There are no facilities at the springs; East Lake Campground is the nearest developed site. Visit Central Oregon says the pools are easiest to use from May to July, when the lake is lower.
El Dorado Hot Spring
A rustic soaking spot west of Phoenix in Tonopah with reservable private soaking areas and a communal, clothing-optional area called Desert Pete for guests 21 and over. Two studios with their own soaking areas and first-come primitive and electric campsites allow overnight stays. Phones are not allowed in the Desert Pete pool area.
El Morocco Inn & Spa
A small Moroccan-themed inn for adults 21 and over, with a natural mineral-water swimming pool and a large covered Jacuzzi-style spa. Day visitors can book a pass that includes two far-infrared saunas, a locker, towel and robe. There is no restaurant, and guests may bring their own food and drinks.
Eldorado Springs Pool
A historic outdoor swimming pool at the mouth of Eldorado Canyon near Boulder, fed by the area's artesian warm springs and reopened after a long renovation. It operates in summer and on September weekends. This is a warm swimming pool rather than a hot soak.
Elkhorn Hot Springs
A remote resort in the Pioneer Mountains of the Beaverhead-Deerlodge National Forest, about 40 miles northwest of Dillon, with two outdoor mineral pools and a Grecian sauna. Lodging includes rustic and modern cabins and lodge rooms, and groomed cross-country ski trails start nearby. After closing during the 2026 Sand Creek Fire it has reopened for pools only, Thursday through Sunday.
Epic Hot Springs
Hot springs pools on North Beach at the north end of Bear Lake, run by Epic Recreation alongside a watercraft rental shop. The operator closes the springs in winter because the geothermal source temperature fluctuates, reopening in spring.
Esalen Institute
A retreat center on the Big Sur cliffs whose hot springs baths sit above the Pacific, fed by springs that emerge at about 119F. The baths have four communal stone tubs, individual claw-foot tubs and an upper-level tub with a lift, and they are clothing-optional. They are open only to overnight guests, and Esalen's public night-bathing reservations are currently closed.
Evans Plunge Mineral Springs
A city-owned indoor pool built over natural warm springs in 1890, holding about 87F year-round from springs that flow around 5,000 gallons per minute. It is a family swim center with slides, swing rings and two kids pools, and admission for ages 16 and up adds the hot tubs, sauna and steam room.
Fairmont Hot Springs Resort
A large resort between Butte and Anaconda with 152 rooms, golf, a spa and hot springs pools fed by a 600-ft well. Pools are open only to overnight resort and condo guests and members, not day visitors. Phase 1 of a pool renovation added an adults-only tiered soaking pool, a family soaking pool, a lap pool and a cold plunge; phase 2 is under construction.
Fairmont Sonoma Mission Inn & Spa
A large resort at Boyes Hot Springs, just north of Sonoma, built over thermal mineral springs. The adults-only Fairmont Spa has five geothermal mineral pools and a Roman-style bathhouse, while the family Main Resort Pool is also filled with naturally heated geothermal water and open year-round. Day visitors can book treatments or a spa pass through ResortPass.
Faywood Hot Springs
A rustic, gated geothermal resort between Deming and Silver City with separate clothing-required and clothing-optional public pools, four private pools and a group pool. Everyone needs a confirmed, prepaid reservation, and first-time visitors must arrive by 8 pm for orientation. Lodging includes cabins, RV sites and tent camping.
Feather River Hot Springs
A small, rustic private campground and cabin site on the Feather River off Highway 70 near Twain, with two riverside tubs at 99 to 104F. Soaks are booked by text in two-hour slots, swimsuits are required, and children are not allowed at the springs. The operator has posted that the springs and all lodging are temporarily closed for medical reasons.
Fifth Water Hot Springs (Diamond Fork)
Several soaking pools along Fifth Water Creek in Uinta-Wasatch-Cache National Forest, beside a series of waterfalls, reached on foot from the Three Forks Trailhead on Diamond Fork Road. Visit Utah lists the soaking pools at about 100-102°F. The Forest Service warns that harmful bacteria may be present and advises not dunking your head and showering after soaking.
Fire Water Lodge
A restored 1920s motor court lodge in the T or C bathhouse district where each guest room has its own private geothermal mineral tub. The lodge says the water reaches the tub at 104-108°F. Baths are for lodgers only.
Fish Lake Valley Hot Springs (Hot Well)
A free hot well managed by Esmeralda County in Fish Lake Valley, about 20 minutes from Dyer on a county dirt road. A large below-ground concrete tub holds water around 105°F, and its outflow feeds marshy ponds that draw wildlife. The site has a large parking area, primitive campsites and a vault toilet.
Fountain of Youth RV Park
An RV park north of Thermopolis built around a large mineral pool fed by the Sacajawea Well, drilled in 1918, which flows about 1.3 million gallons a day. Travel Wyoming lists the water at 100-104°F, and a 2024 report says new owners were restoring the pools and selling all-day passes to non-campers.
Fountain of Youth Spa & RV Resort
An RV resort and villa park near the Salton Sea whose signature Lobster Pot raw mineral spa runs at about 100-104F. There are also three private soaking tubs with adjustable temperatures and separate mineral steam rooms. The pools are included for registered guests.
Franklin Hot Springs
A family-run hot springs on farmland east of Paso Robles, where a 1952 oil survey struck mineral water instead. It has a large spring-fed pool of about 97F, a hot tub of about 100F and a lake for fishing and boating, all on one $10 day pass. The owners say no chemicals are added to the springs, and tent and RV camping is available.
Frenchman's Bend Hot Springs
Natural hot spring pools tucked against boulders beside Warm Springs Creek and its gravel road, about 11 miles from Ketchum in the Sawtooth National Forest. Visit Idaho notes the springs are well known and see heavy traffic on weekends and holidays. The source water emerges at about 124°F, far hotter than the creek-side soaking pools.
Gandy Warm Springs
A large warm spring, about 81°F, pouring nearly 9,000 gallons a minute out of the base of Spring Mountain in Snake Valley near the Nevada line. Visit Utah describes a lower pool that fits about a dozen people, with a small cave under a waterfall, and a more private upper pool about 50 feet up the hill. The site is on BLM land with no facilities, and the nearest services are about 30 miles away.
Gaviota Hot Springs
Two small warm sulfur springs in the uplands of Gaviota State Park, reached by a somewhat steep climb on the Gaviota Peak Fire Road. The trail starts from a parking lot about 2.5 miles north of the main park entrance, where Highway 1 splits from U.S. 101. The park map puts the springs 0.7 mile from the lot, and the fire road continues on to Gaviota Peak.
Gila Hot Springs Ranch
A family-run ranch in the hamlet of Gila Hot Springs, 4 miles south of Gila Cliff Dwellings, with apartments, a historic cabin, an RV park and tent sites. The ranch has a natural hot springs jacuzzi, and its lodgings and RV hookups are piped with hot spring water. NM 15 from Silver City is about 2 hours of winding road; rigs over 20 ft should use NM 35.
Givens Hot Springs
A family-run indoor hot spring pool on Highway 78 at the base of the Owyhee Mountains, about an hour from Boise, in operation since 1881. Swimming needs no reservation and is open daily from noon to 9 pm. The grounds include RV and tent camping, a tipi and a picnic park.
Glen Ivy Hot Springs
A long-running adults-only day spa in Temescal Valley with 19 pools and water features, led by 104°F Mineral Baths fed by a geothermal source. Admission covers Club Mud, saunas, steam rooms, a hot and cold plunge circuit and daily classes. Reservations are required and there is no re-entry.
Glenwood Hot Springs Resort
A large downtown resort built around the Grand Pool, which stretches more than two city blocks, plus a 104°F therapy pool. The newer Yampah Mineral Baths add three hot pools between roughly 95 and 104°F and two cold-contrast baths, and that area turns adults-only after 5 pm. Day passes are sold without reservations, and the resort runs two hotels on site.
Goddard Hot Springs
City and Borough of Sitka property on Hot Springs Bay, on the outer coast of Baranof Island about 16 miles south of Sitka. The city maintains two cedar bathhouses with tubs, plus open shelters, boardwalks and outhouses. The spring emerges at about 153°F, and tubs are cooled with a cold-water supply.
Gold Fork Hot Springs
A privately run soaking site on Gold Fork Road east of Donnelly, with six rock-formed, flow-through pools and a sandy children's pool. Admission is cash only, there is a two-hour soak limit, and no reservations are taken. Winter hours run Wednesday to Monday, with Thursdays set aside for guests 18 and over.
Gold Strike Hot Springs
Warm and hot springs in Gold Strike Canyon, which drops to the Colorado River just below Hoover Dam in Lake Mead National Recreation Area. The NPS rates the 5.3-mile round trip as very strenuous: a Class 2 canyoneering route with seven dry falls and about 1,200 ft of elevation change. The trail closes each year from May 15 to Sept. 30 for heat, but the springs stay reachable by water.
Goldbug Hot Springs
Hot springs on BLM land east of Elk Bend, 23 miles south of Salmon off US-93, reached on foot from the end of a county road. The first quarter mile of the trail crosses private property on a public easement, where dogs must be leashed. There is no fee.
Golden Haven Hot Springs Spa and Resort
A family-owned spa and lodge on a residential street near downtown Calistoga, using mineral water from a geothermal aquifer beneath the property. Its gated, partly covered pool runs about 85-88°F, with two adjoining hot spas at 98-100°F and 102-104°F. There is no day use; the pool comes with a stay or any spa treatment, including shared couples mud baths.
Goldmyer Hot Springs
A 20-acre wilderness preserve in the Middle Fork Snoqualmie Valley, owned by the nonprofit Northwest Wilderness Programs, where hot water flows from a small cave into three cascading pools beside a creek-fed cold pool. Entry is capped at 20 people a day, by phone permit or cash walk-in, and the springs are swimsuit-optional. Visitors drive a rough forest road and then hike or bike about 4.5 to 5 miles from the Dingford Creek gate.
Grande Hot Springs RV Resort
An RV park beside Hot Lake Springs Resort with warm (92-96F) and hot (102-104F) mineral pools for registered guests, plus two yurts with private soaking. The pools run April-September and closed on October 3, 2026 for winter upgrades. It shares owners with Hot Lake Springs Resort.
Granite Hot Springs
A developed concrete hot spring pool on Granite Creek in the Bridger-Teton National Forest, at the end of a rough dirt road about 34 miles from Jackson. It opens late May to Oct 31 and again early December to Mar 17, when the pool is reached only by snowmobile, dog sled, skis or fat bike. Entry is cash only and alcohol is not allowed.
Green Canyon Hot Springs
A family-run hot springs pool in a canyon near Newdale and Rexburg, fed by a 115°F spring. The venue lists a 96°F big pool, a 105°F hot pool and a 55°F cold pool, with RV and tent camping on site. Summer swim-lesson camps are held here and fill about a year ahead.
Grover Hot Springs State Park
A California state park 4 miles west of Markleeville with a concrete hot mineral pool fed by six springs and a separate cooler swimming pool, run with a lifeguard on duty. The hot pool is kept at 102-104°F, and pool entry is sold separately from the $8 vehicle day-use fee. The park also has a forested campground, picnic area and trails to a waterfall and Burnside Lake.
Harbin Hot Springs
A rustic, clothing-optional retreat center north of Middletown run by the non-profit Heart Consciousness Church, with eight Mainside pools ranging from a very hot enclosed pool to cold plunges, plus a sauna and steam room. Visitors buy a membership and a 3-, 6- or 24-hour pass, and the property bans alcohol, drugs, phones and cameras. Rebuilding after the 2015 Valley Fire continues, with two new Mainside hotels under construction.
Hart Mountain Hot Springs
A natural spring inside Hot Springs Campground at the eastern base of Warner Peak in Hart Mountain National Antelope Refuge, soaked in a stone enclosure at about 102°F. The campground is free and first come, first served, with vault toilets and no drinking water. The refuge asks visitors not to alter the springs and not to use soap.
Haven Hot Springs
A roadside stop on Highway 21 near Kirkham with a 1951 pool, about 75 by 30 feet, fed by flowing thermal water and hotter on one side (101-104°F) than the other (85-98°F). The pool is booked as a private soak by the hour, and each of the four motel rooms has its own soaking tub. RV and tent sites are on site.
Healing Waters Resort & Spa
A family-owned motel resort in Pagosa Springs, run by the same family since 1950, with a large outdoor mineral swimming pool, a hot tub and separate men's and women's indoor baths. Day soaking is walk-in. The pools use untreated mineral water.
Heise Hot Springs
A family resort on the South Fork Snake River east of Ririe with a hot mineral pool kept around 104°F and a summer swimming pool with a 350-ft water slide. The grounds include cabins, RV campgrounds, a golf course and a pizza parlor. The resort was evacuated during the August 2026 Big Rock Fire and has since reopened.
Hobo Pool
A free, town-owned hot pool in Saratoga on the bank of the North Platte River, open around the clock. Carbon County lists the main pool at 101-110°F and the Lobster Pot at one end at about 120°F. Swimsuits are required, and alcohol, tobacco and glass are banned.
Home Hotel Lava Hot Springs
A family-run hotel on Main Street dating to 1918, originally called the Raya Hotel. Most rooms have private baths filled with natural hot springs water. It sits within walking distance of the state-run Hot Pools.
Homestead Crater
A geothermal spring inside a beehive-shaped limestone dome on the Homestead Resort grounds in Midway, entered through a ground-level tunnel. The water is about 90-96°F and roughly 65 feet deep, so life vests are required for everyone except certified divers. Soaks are sold in one-hour slots with about 40 minutes in the water.
Hoosier Hot Springs & Inn
An adults-only 1937 inn in downtown T or C, revitalized in 2026, with four private soaking spaces: three walled outdoor pools and the original indoor bath. Untreated, unheated mineral water flows in at about 104°F and drains back to the Rio Grande, and each pool is drained and cleaned between reservations. Inn guests get a free 1-hour soak per night.
Hope Springs Resort
A small adults-only (21+) motel-style retreat with three pools fed by an on-site hot mineral well: an ambient swimming pool, a 92°F pool and an enclosed 104°F pool. The pools are for overnight guests only. Rooms have no TVs, and the resort asks for quiet voices and no phone calls around the pools.
Horse Creek Hot Spring
A hot spring with dispersed camping in the Salmon-Challis National Forest, near the border of the Frank Church-River of No Return Wilderness and Montana's Bitterroot National Forest. It sits at 6,200 feet, about 36 miles of forest roads west and north of North Fork. There is no potable water and there are no picnic tables or fire rings.
Hospital Bar Hot Springs
A riverside hot spring at Hospital Bar camp, river mile 52.1 on the Middle Fork of the Salmon in the Frank Church-River of No Return Wilderness. The Forest Service lists it as one of six hot springs camps on the float; each permitted group may be assigned only one, and it is not guaranteed. The agency warns that some Middle Fork springs are hot enough to burn and bans soap in hot springs.
Hot Lake Springs Resort
A restored 1906 lodge on Hot Lake outside La Grande with nine outdoor mineral pools, including a historic brick pool and a rock pool, plus a 40-45F cold plunge. Day soaks need an online reservation and cost $20 Monday-Thursday or $29 Friday-Sunday. Children 11 and under are not allowed in the soaking area.
Hot Springs Campground Hot Spring
A natural hot springs soaking pool on the South Fork Payette River, across the Banks-Lowman Road from the Forest Service's Hot Springs Campground and down a staircase. The campground east of Garden Valley is open from early May to the end of September and is reserved through Recreation.gov.
Hot Springs Glamp Camp
A small private RV park and glamping compound in the T or C hot springs district with remodeled vintage trailers, a yurt and a dome. Overnight guests can use three outdoor multi-person mineral baths and one indoor single bath at any hour; the county lists water at about 107-109°F. Baths are for guests only.
Hot Springs Long Term Visitor Area (Holtville)
A BLM long-term visitor area east of Holtville in the Imperial Valley, known for a historic hot spring that BLM describes as still active and popular with locals and winter visitors. Camping here needs an LTVA permit from mid-September to mid-April. BLM lists swimming among its activities but publishes no pool details.
Hot Springs Resort & Spa
North Carolina's only hot springs resort, on the banks of Spring Creek and the French Broad River in the Appalachian Trail town of Hot Springs. Natural hot mineral water is piped to private outdoor tubs rented by the hour for up to five people, each drained and cleaned after every use. The resort is rebuilding after Hurricane Helene destroyed most of its tubs and lodging in 2024, so fewer tubs and rooms are available.
Hot Sulphur Springs Resort & Spa
A long-running hillside resort in the town of Hot Sulphur Springs with about 19 public mineral pools between 98 and 112°F. Day passes are walk-in only, and some pools are restricted to ages 12 and up. The property also has a motel, private baths, massage and a grill.
Hot Well Dunes Recreation Area
A remote BLM recreation area about 35 miles from Safford where two cement tubs are filled with about 106°F water from an artesian well and solar pump. The tubs fill from roughly an hour after sunrise to an hour before sunset and drain nightly. The site also has about 2,000 acres of off-highway-vehicle dunes and basic campsites.
Hotel Hale
A nine-suite boutique hotel in the 1892 Hale Bathhouse, the oldest building on Bathhouse Row. Every suite has a large soaking tub filled with thermal water piped from the park's springs, so soaking is for overnight guests only. The ground floor holds Eden, a restaurant with a living wall and full bar.
Hunter's Hot Springs Resort
A small resort just north of Lakeview beside Old Perpetual, a geyser that erupts from the hot springs here. It has one outdoor mineral pool kept at about 104°F, open to day visitors Tuesday to Sunday afternoons. Twelve rooms, RV dry sites and tent camping are on site, along with The Geyser Room restaurant and bar.
Idaho Rocky Mountain Ranch
A guest ranch in the Sawtooth National Recreation Area south of Stanley with a 20 by 40 foot pool fed by a hot spring piped across the Salmon River. The pool is kept at 99-104°F and is open only to ranch guests. The ranch runs a summer season; 2027 dates are June 11 to September 9.
Indian Hot Springs
A historic spa in Idaho Springs with separate men's and women's geothermal cave baths, a mineral-water swimming pool and private tubs. Lodging, a restaurant and spa services are on site. Prices and cave rules should be confirmed directly, as public listings conflict.
Indian Springs
A bathhouse and cottages, formerly the Langford Tourist Courts, whose two baths built in 1927 from wood, redwood and lava rock have gravel bottoms with natural artesian flow. Walk-in bathers are taken first come, first served. Facts come from the county tourism listing, as the business has no website.
Indian Springs Calistoga
A historic Calistoga resort whose Olympic-size Main Pool, built in 1913, is fed by mineral water from on-site geysers that surfaces around 230°F and is cooled in reservoirs. A smaller Adult Pool sits next door and runs about ten degrees cooler than the Main Pool. Hotel guests use the pools; day visitors need a spa booking plus a pool pass.
Indian Springs Resort & RV
A summer swimming pool known as The Nat, nearly 100 years old, with an RV park and campground south of American Falls. The 2.5- to 7-ft pool has two slides and a jumping board; the venue states chlorine is added.
Iron Mountain Hot Springs
A modern soaking complex beside the Colorado River with dozens of small mineral pools ranging from about 89 to 112°F. An adults-only (21+) tier adds a sauna area, plunge pools and WorldSprings-style pools, while a family zone serves younger children. Passes are tiered and cheaper when booked online.
Jackson Hot Springs Lodge
A rustic lodge in the Big Hole Valley town of Jackson with one outdoor hot springs pool at 100-106F that the lodge says uses no chemicals. Rooms, sleeper cabins and rental houses come with swim passes, and the pool is also open to the public. The pool, restaurant and lodge are closed Monday through Wednesday.
Jackson WellSprings
A mineral springs retreat on 30 acres along Bear Creek, about 2.5 miles from downtown Ashland, with a 95-foot swimming pool, a hot tub, a sauna, a steam room and private tubs. The spring water arrives at about 103°F, and the venue says it uses no chlorine or bromine. Daytime sessions are family friendly; evening sessions are adults-only and clothing-optional.
Jacumba Hot Springs
A hotel in the high desert town of Jacumba Hot Springs, about an hour east of San Diego, whose mineral spring water flows into its pools with no chemical treatment. Day passes cover the large outdoor Ritual Pool (96-101°F), with a limited-pass Solstice Pool and an indoor Echo Room (99-103°F) for hotel guests. Pool access is for ages 21 and over.
Jemez Hot Springs
Formerly Giggling Springs, this walk-in soaking spot in the village has four outdoor mineral pools kept at 98-105°F beside the Jemez River. Soaks are sold by the hour on a first-come basis, swimsuits are required, and visitors must be 14 or older. The pools use UV light instead of chemicals and are drained and cleaned every night.
Jemez Springs Bath House
A historic bathhouse on the plaza owned and run as a non-profit by the Village of Jemez Springs, with eight oversized private cement tubs and four massage rooms. Tubs fill with 100% spring water, mixed from hot water and water cooled overnight in tanks so bathers can set their own temperature. Tubs are individual, swimsuits aren't needed, and children under 14 are not allowed.
Jerry Johnson Hot Springs
A set of undeveloped pools along Warm Springs Creek, reached by crossing the Warm Springs Pack Bridge over the Lochsa River at milepost 152 of US Highway 12. There are three groups of pools: the Waterfall Pools, a set in a meadow and a set above the meadow. The Forest Service limits use to 6am-8pm and bans overnight camping at the springs.
Jordan Hot Springs
Backcountry hot springs in the Golden Trout Wilderness, reached on the Forest Service's Jordan Hot Springs Trail from the Blackrock Trailhead. The trail is used from May to November and is open to hikers and horse riders. Overnight visitors need a Golden Trout Wilderness permit.
Jordan Hot Springs
A warm spring pool about 20 feet across and 3 feet deep at roughly 90-94°F, deep in the Gila Wilderness. It is about 7 miles one way from the TJ Corral trailhead via Little Bear Canyon, or 8.5 miles up the Middle Fork, with many river crossings either way. The NPS recommends it as an overnight trip and notes it is crowded at busy times such as spring break.
Joyful Journey Hot Springs Spa
A spa retreat near Moffat in the San Luis Valley, built on the historic Mineral Hot Springs site, with three main pools held at 98, 104 and 108°F plus jacuzzis and a cold plunge. Lodging ranges from hotel rooms to yurts, tipis and campsites. Leashed dogs are welcome on the grounds but not in the pool area.
Kachina Mineral Springs Spa
A family-run mineral spa near Safford, operating since 1993, with private indoor soaking tubs reserved for one party at a time and a reservable outdoor mineral pond and hot tub area. Massage and Reiki sessions include time in the tubs. Swimsuits are optional indoors and required outside, where guests must be 12 or older.
Kah-Nee-Ta Hot Springs Resort
A tribally owned resort on the Warm Springs Reservation that reopened in 2024 after a $13 million renovation. Mineral pools run about 92-104F, with kids' pools, a lazy river and a 37F cold plunge, plus hotel rooms, a teepee village and RV sites. Pools are closed Tuesdays and Wednesdays through March 2027.
Keough's Hot Springs
A pool resort south of Bishop, open since 1919, where spring water is cooled by a waterfall into a large swimming pool alongside a smaller hot soaking pool. Day entry is $14 for adults. The property also has RV and tent sites and furnished canvas tent cabins, and Inyo County's visitor site notes that swimsuits are required.
Kern Hot Spring
A cement soaking tub a few feet from the Kern River, 36.8 miles from Crescent Meadow on the High Sierra Trail in Sequoia National Park. The spring water is 115F, and the tub's runoff mixes with river water to form a cooler pool. Campers must use the designated sites here, and the park asks for no soap in the tub or river.
Kirkham Hot Springs
Hot pools and small steaming waterfalls on the rocks along the South Fork Payette River at milepost 77 on Highway 21, about 5 miles east of Lowman. The Forest Service runs it as a day-use site, open 7am to 9pm with a $5 vehicle fee, vault toilets and changing rooms. The old campground is closed to overnight use.
Kosk Creek Hot Springs (Hunt and Kosk)
Rustic hot spring pools of varying temperatures on a private ranch along Kosk Creek near Big Bend in eastern Shasta County. The landowner now sells day passes and campsites through Hipcamp; earlier free access has ended. There is no potable water or trash service, so visitors pack out everything.
Langford Hot Springs (Big Bend Hot Springs)
A 105F spring in the stone foundation of J.O. Langford's early-1900s bathhouse on the bank of the Rio Grande in Big Bend National Park. It is a short walk from the Hot Springs historic district at the end of a 2-mile gravel road. NPS allows soaking only, with no soap, alcohol or glass, and the spring can be buried by river floods.
Lava Hot Springs Inn & Spa
A historic inn at the west end of Lava Hot Springs with outdoor mineral pools from 94 to 107F and a 44F cold plunge. Non-guests can buy a $15 all-day pass at the front desk, and overnight stays include pool access and a hot breakfast. Massages, including aquatic Watsu, are offered on site.
Lava Hot Springs World Famous Hot Pools
Five outdoor mineral pools on Main Street in Lava Hot Springs, run by the Lava Hot Springs Foundation, a self-funded Idaho state agency. Water ranges from about 102 to 112F, is not treated with chemicals and flows through to the Portneuf River. The pools are open year-round except Thanksgiving and Christmas Day.
Lido Palms Resort and Spa
A small inn on Tamar Drive with a 103°F outdoor hot tub, a 99°F indoor hot tub and a warm outdoor pool, all filled with mineral water pumped from the ground. Day passes cost $55 for visitors 18 and over and include the sauna, towels and robes. Swimwear is required, and rooms have full kitchens.
Lightfeather Hot Springs
A hot spring that pulses from the base of a hill into the Middle Fork of the Gila, about three-quarters of a mile up Trail 157 from the Gila Visitor Center. The source is scalding, about 130-140°F according to the NPS, so visitors soak in rock-lined pools in the river where the hot water mixes with river water. The short walk includes several river crossings.
Lithia Springs Resort
A hotel on West Jackson Road about 3 miles from downtown Ashland that pipes warm, sulfur-rich spring water to its rooms, many of which have private soaking tubs or mineral showers. The water surfaces at about 90°F and is aerated to release sulfur gas. Soaking is for overnight guests; there is also a seasonal saline pool, a Jacuzzi and a small spa.
Little Caliente Hot Springs
A primitive, undeveloped hot spring on the Santa Barbara Ranger District, a short walk from Mono Campground beyond Pendola Station. The Forest Service treats it as day-use only, with no camping at the springs. The Little Caliente Picnic Area and Mono Campground are closed under a storm-damage order through September 15, 2027.
Lolo Hot Springs Resort
A historic hot springs on US 12 in the Lolo National Forest, between the town of Lolo and the Idaho border. It has an indoor hot pool at about 103-106F and an outdoor pool at roughly 74-85F, plus a bar, restaurant, cabins and RV and tent sites. On Wednesday and Sunday nights from 9pm the pools are 18+ and clothing optional.
Lost Trail Hot Springs Resort
A family resort at the base of Lost Trail Pass in the upper Bitterroot Valley, on the site of the old Gallogly Hot Springs. A chemical-free 20 x 70 ft pool averages about 95F and is covered by a dome in colder months, alongside a 103-105F hot tub and a dry sauna. Lodges, cabins and an RV park and campground are on site; hours are limited outside July and August.
Manby Hot Springs
Two hot pools beside the Rio Grande at the stone ruins of an old stagecoach stop, southwest of Arroyo Hondo near Taos. State tourism describes an easy hike from the John Dunn Bridge, following the river south to the rocks that mark the pools.
Maple Grove Hot Springs
A 45-acre off-grid retreat on the Bear River at the north end of Oneida Narrows Reservoir. Six soaking pools, including three circular stone pools and a creek pool, run about 100-107F, fed from source ponds over 160F that are off-limits. Day visitors book 3-hour blocks; the site is alcohol-free, swimwear is required and pools go silent after sundown.
McCauley Warm Springs
Two large warm pools at about 99°F in a forest meadow between Battleship Rock and Jemez Falls, reached on East Fork Trail #137. State tourism puts the hike at about 2 miles from the Battleship Rock picnic area. The village tourism site says these public-land springs are day use only, with no camping, fires or facilities.
McCredie Hot Springs
Undeveloped hot springs along Salt Creek on the Willamette National Forest, reached by a short trail from the McCredie Day Use Area on Highway 58 about 8 miles east of Oakridge. The Forest Service runs the site as day use only, sunrise to sunset, with a $5 per-vehicle fee. There is a vault toilet but no drinking water or trash service.
Meadow Hot Springs
Travertine spring pools in a farmer's field west of Meadow, south of Fillmore, on private land the owner keeps open to the public. Visit Utah describes two pools, the deeper one around 100°F with rock shelves, and says the owner built a walking trail and fence. Posted rules require swimsuits and ban alcohol, and visitors are asked to clean up.
Meadowlark Country House and Resort
An adults-only country inn on Petrified Forest Road outside Calistoga with a mineral-water lap pool, mineral hot tub and Finnish sauna. The inn says its well water is warmed by volcanic activity; the pool is seasonally heated and not heated in winter. The pool area is clothing-optional, and day visitors can call ahead for a day or evening pass.
Medbery Spa & Wellness
A day spa on Front Street in Ballston Spa that draws naturally carbonated mineral water from the Sans Souci spring, whose 690-foot well dates to 1870. Soaks are private and 30 minutes as standard, with a jacuzzi tub for couples. The spa says the spring runs about 50°F, so hot tap water is added to the bath.
Mercey Hot Springs
An off-grid resort in the Little Panoche Valley, 13 miles west of I-5, where salty mineral water emerges at about 112F. Outdoor tubs run 102-106F and are clothing-optional and adults-only, while the heated swimming pool is 85-90F and needs swimsuits. Day use is by reservation from noon to 5pm, and stays range from cabins and Airstreams to RV and tent sites.
Merrifield Homestead Cabins & Hot Springs
Historic homestead cabins at 19320 County Road 306 west of Buena Vista, run by the same family as Charlotte Hot Springs. The family once rented soaks to miners here in the 1930s and still heats greenhouses with the geothermal water. Soaking arrangements and rates were not listed online.
Mi Kasa Hot Springs
A small adults-only (21+), clothing-optional hotel with a natural hot springs pool, an indoor jacuzzi at about 103F and an outdoor jacuzzi at about 100F. Day passes and private tub rentals run 9am to 10pm with single entry. Leashed pets are welcome but may not enter the water.
Miracle Hot Springs
A geothermal soaking resort on Highway 30 near Buhl in the Hagerman Valley. Four outdoor pools are kept between 96 and 106F with no chlorine, and private open-roof pools can be booked by the hour. Overnight options include geodesic domes, a park home and RV sites, and reservations are required for all soaking.
Miracle Manor Boutique Hotel & Spa
A nine-room 1950s motel on Miracle Hill with a mineral water pool, a jacuzzi and private hot and cold mineral tubs. Day passes include pool access from 9am to 5pm, a yoga session and a locker, and reservations are required. The property is adults-only (21+) and pet-free.
Miracle Springs Resort & Spa
A hotel and spa on Palm Drive with a courtyard of eight natural hot mineral pools, which Greater Palm Springs tourism describes as 140°F water cooled to 90-104°F. Day passes ($20, 21+) are walk-in only, and visitors should bring their own towel and a lock. The Capri Italian Restaurant serves poolside.
Moccasin Springs Natural Mineral Spa
An adults-only outdoor mineral spa in Hot Springs with two large natural-temperature pools around 88-93F and three hotter pools of heated spring water at 98-105F. Two-hour soak passes are pre-purchased online for a set time and often sell out. A barrel sauna, massage rooms and the Dragonfly Restaurant are on site.
Mono Hot Springs Resort
A seasonal High Sierra resort on the South Fork San Joaquin River, reached over the narrow Kaiser Pass Road, with soaks in private bathhouse rooms and an outdoor mineral spa at about 100-104°F. Day bathhouse passes are $25 for adults, and stays in the stone, rustic and tent cabins include bathhouse use. The 2026 season ran May 22 to October 26.
Montezuma Hot Springs
Natural springs that flow from a hillside into a row of rock and cement soaking tubs of varying temperatures beside NM 65, six miles northwest of Las Vegas. They were once part of the Montezuma Castle resort and sit near the United World College campus, which is otherwise closed to the public. State tourism calls them family-friendly since no hike is needed.
Mormon Bend Hot Springs
A hot spring near the Forest Service's Mormon Bend Campground on the Salmon River east of Stanley, listed by the Stanley-Sawtooth Chamber among the area's soakable springs. The campground has 15 sites and is open April through September.
Morton's Warm Springs
A family-oriented summer swimming resort in the Valley of the Moon with two geothermal mineral pools and a toddler wading pool, all around 90-94°F. The grounds along Sonoma Creek have picnic lawns and BBQs, and the deep pool is reserved for adult swim each morning. It is closed for the off-season and reopens May 1, 2027.
Mount Princeton Hot Springs Resort
A large resort below the Chalk Cliffs between Buena Vista and Salida, with a historic bath house, terraced upper pools, an infinity pool and natural soaking spots along Chalk Creek. Day passes are walk-in, and summer adds twin water slides. An adults-only spa pool area is reserved for lodging guests and spa clients.
Mount View Hotel & Spa
A 1917 art deco hotel on Lincoln Avenue in downtown Calistoga with a day spa. Its mineral whirlpool and hydrotherapy tubs use water from the spa's own geothermal well, which surfaces at about 120°F, alongside a heated pool. Details could not be confirmed on the hotel's own site.
Mountain Village Resort Hot Springs
Three spring-fed soaking tubs in buildings on Valley Creek, about a third of a mile walk from the Mountain Village Lodge in Stanley. The two private tubs book in 90-minute sessions and the shared Osprey tub in one-hour sessions, free for lodge guests. Water usually runs 98-104°F with no chemicals added.
Muir Trail Ranch
A remote guest ranch in the John Muir Wilderness, reached by ferry across Florence Lake and a hike of about 5 miles, whose stays include use of its hot springs baths. Short stays include meals and run about $250-$285 per person per night. Accommodations closed for the season after September 7, 2026, and bookings are closed until 2027.
Murrieta Hot Springs Resort
A historic hot springs resort in Murrieta with lodging and more than 20 pools fed by geothermal spring water found on the property, posted at roughly 50°F to 104°F. Most pools use untreated mineral water, while the Blue Lagoon, Oasis, Roman Spa, Vitality Plunge and indoor bathhall are treated. Day passes are sold to families, with separate adults-only areas including a terrace with a panoramic sauna.
Mystic Hot Springs
A hillside hot springs retreat in Monroe on the old Cooper homestead, where 165°F spring water cools as it runs down to two 20-foot pools and five cast-iron tubs. Soaking is by reserved 2-hour slot shared with others booked at the same time. Overnight guests stay in a pioneer cabin, converted buses, tent sites or RV sites.
Nat-Soo-Pah Hot Springs & Campground
A family-run summer pool and campground south of Twin Falls near Hollister, operating for over 100 years on the Nat-Soo-Pah spring. The pool opens from May 1 to Labor Day with lifeguards and a snack bar, and the campground runs into mid-October.
Neka Hot Springs
A Forest Service hot tub on Chichagof Island, reached by a 0.2-mile boardwalk across muskeg near milepost 9 of Forest Road 8580. Getting there means a boat to Eight Fathom Dock, 16 miles southwest of Hoonah, then nine miles on a single-lane road. There are vault toilets but no drinking water, and brown bears often use the area.
Norris Hot Springs
A single 40-by-40-foot pool built of locally milled fir planks laid over artesian springs, about 35 miles west of Bozeman. The pool is drained every night and refills with fresh water; no chemicals are used, and temperatures run below 100F in summer and up to 106F in winter. A cafe, saloon and frequent live music share the site, with a summer campground next door.
Ojo Caliente Mineral Springs Resort & Spa
A historic spring resort below mesa cliffs on the Rio Ojo Caliente, with nine communal mineral pools named for their iron, soda, lithia and arsenic content, running about 80-105°F. Day passes are sold at the door with no reservations, and the springs are for ages 13 and up. The property also has a spa, a restaurant and wine bar, a 1916 hotel, cottages and an RV and tent campground.
Old Town Hot Springs
A non-profit community hot springs and fitness center in downtown Steamboat Springs, fed by the Heart Spring, which flows at about 102-103°F. Alongside several soaking pools and a cold plunge it has water slides, lap swimming, a gym and a climbing wall. Day admission is walk-in.
Olympic Hot Springs
Natural hot springs in Olympic National Park's Elwha Valley, where a resort once stood. Since the Olympic Hot Springs Road washed out, visitors walk or bike from the Madison Falls gate to the Boulder Creek Trailhead and then hike 2.4 miles, about 10.5 miles one way in total. The park enforces a year-round burn ban in the area and asks visitors to store food carefully.
Orr Hot Springs
A small clothing-optional resort on 27 acres at the headwaters of Big River, about 12 miles west of Ukiah on Orr Springs Road. The bathhouse has private and communal tubs, a swimming pool, sauna, steam room and cold plunge, and guests cook their own meals in a shared kitchen because no food is sold. Day use runs noon to 9pm by reservation, and there is no cell service or WiFi.
Orvis Hot Springs
A clothing-optional hot springs between Ridgway and Ouray with ten indoor and outdoor pools and ponds from about 65 to 112°F, using water that is neither heated nor treated. Outdoor areas and the sauna are clothing-optional for adults, while children must wear suits. Rooms and a small campground offer round-the-clock soaking.
Ouray Hot Springs Pool
A city-run hot springs pool complex at the north end of Ouray with soaking pools from about 95 to 106°F, a lap pool and an activity pool that becomes a cold plunge in winter. Summer adds water slides and a climbing wall, and there is an adults-only soaking section. Entry is walk-in.
Overlook Hot Springs Spa
A downtown Pagosa Springs bathhouse in a historic building with indoor tubs and rooftop soaking tubs overlooking the San Juan River. It also has a cold plunge, sauna, a bookable private tub room and massage. It tends to be quieter in the morning and busier in the evening.
Paulina Lake Hot Springs
Small pockets of geothermal water on the northeast shore of Paulina Lake inside the Newberry Caldera, where visitors have stacked rocks to form shallow soaking pools. The site is undeveloped and reached on foot from the Little Crater area on the Deschutes National Forest. Visit Central Oregon says access is best from May to July, when lake levels are lower.
Pelican Spa
A quirky, fully pet-friendly motel and bathhouse with private indoor soaking rooms and deep Japanese-style concrete tubs, filled fresh for each session. The geothermal water is pumped straight from the source without heating or treatment and runs about 102-112°F. Tubs are first come, first served, and non-guests can buy hourly sessions or soak cards at the front desk.
Penny Hot Springs
Rock-ringed pools on the west bank of the Crystal River just off Highway 133 north of Redstone, partly owned and managed by Pitkin County Open Space. Access is free and year-round from a small roadside pullout. River levels decide conditions, and the pools are often under cold water during spring runoff.
Piedra River Hot Springs
Several small rock pools along the Piedra River west of Pagosa Springs, reached by a roughly 1.5-mile hike from the Sheep Creek trailhead off First Fork Road. The Forest Service lists temperatures of about 95-105°F depending on how much river water mixes in. Bikes and pack animals are not allowed, and poison ivy is common along the route.
Pine Flats Hot Springs
Riverside soaking pools below a hot waterfall on a cliff above the South Fork Payette River, reached by a quarter-mile nature trail from the Forest Service's Pine Flats Campground west of Lowman. The campground runs end of May to end of September. In winter the gate is closed and visitors walk the road.
Pipestone Village & Hotsprings
Glamping cabins and domes near Whitehall, each with a private outdoor hot springs tub, on the site of the historic Pipestone Hot Springs. Soaking is for overnight guests only. Off-road and hiking trails surround the property, and Lewis & Clark Caverns and Butte are within a short drive.
Pohoiki Warm Ponds (Isaac Hale Beach Park)
Warm, geothermally heated ponds at Isaac Hale Beach Park in Puna, formed when 2018 lava flows filled the old Pohoiki boat harbor with black sand. State tourism lists the park with lifeguard, parking and portable toilets, and warns that bacteria may be present because the warm water has no known circulation. The surf at the beach itself is for experienced swimmers only.
Quapaw Baths & Spa
A 1922 Bathhouse Row building reopened as a spa, with public thermal pools under a stained-glass skylight plus private mineral baths. Pool entry is walk-in and first come first served, for ages 14 and up. Swim attire and rubber or plastic slip-on shoes are required.
Quinn's Hot Springs Resort
A resort on the Clark Fork River near Paradise with two lodges, more than 25 cabins, a restaurant and tavern. Its pool complex mixes 118F well water to temperatures from the upper 90s to 106F, with a 55F cold plunge and pools zoned by age, including an adults-only pool. Day visitors must book one of three 4-hour swim sessions online in advance.
Radium Warm Springs
A warm spring pool above the Upper Colorado River near the hamlet of Radium, southwest of Kremmling. The BLM directs visitors to a trailhead at the end of Warm Springs Road, because the old social trail from the CPW Mugrage site is closed to protect bighorn sheep habitat. A fee campground and river access are nearby at the Radium Recreation Area.
Rainbow Hot Springs
Primitive pools on the bank of the West Fork of the San Juan River in the Weminuche Wilderness, about 5.3 miles up the West Fork Trail northeast of Pagosa Springs. Camping is allowed only at nine designated sites, campfires are banned near the springs, and the first mile of trail crosses private land. Pool conditions shift with runoff and storms.
Red River Hot Springs
An off-grid lodge in the Nez Perce National Forest near Elk City with a natural hot spring pool that is not chlorinated. It rents lodge rooms, cabins (one with its own outdoor mineral soaking tub) and dry RV and tent sites, and a cafe serves burgers and breakfast burritos on weekends. Day soaks are paid per visit with no re-entry, and nudity is prohibited.
River Oaks Hot Springs Spa
A day spa in Paso Robles that rents geothermal artesian mineral tubs by the hour, either private covered rooms indoors or semi-private open-air tubs outdoors. Soaks cost $30 per person per hour, and the Sip & Soak package adds a wine-tasting flight in an outdoor tub. Massages and facials include a 30-minute indoor soak.
Riverbend Hot Springs
A hot springs inn on the Rio Grande in Truth or Consequences with eight common pools of 95-107°F on a shaded river deck, and seven private pools rented in 50-minute sessions. Both the hourly Property Pass and private soaks are booked in advance, and guests must be 12 or older. The largest common pool, Sierra, has an ADA pool lift.
Riverside Hot Springs Inn & Spa
An adult-only boutique hotel on the Portneuf River in downtown Lava Hot Springs. Three private indoor soaking rooms on the lower level take continuously flowing mineral water, tempered to 102-106F. Soaks are booked in advance and limited to 30 minutes.
Rocky Canyon Hot Springs
A three-tiered hot spring above the Middle Fork of the Payette River, about 12 miles up South Middle Fork Road from Crouch. Reaching it means wading the river, which Visit Idaho says is only safe in summer at low water. Parking is a small pull-off on the left of the road.
Roman Spa Hot Springs Resort
A downtown Calistoga hotel with three soaking pools filled with geothermal water from the resort's own wells: a large outdoor pool at about 92-96°F, an outdoor jetted hot tub at 103°F and an indoor jetted pool at 100°F. The Baths at Roman Spa offers mud baths made with geothermal water, volcanic ash and peat. Pools are soaking-only, with no diving or splash games.
Roosevelt Baths & Spa
A 1935 bathhouse in Saratoga Spa State Park, run with The Gideon Putnam hotel, where guests soak in private tubs of naturally carbonated mineral water. The spa says the water is drawn cold from underground springs and mixed with warm fresh water to a neutral temperature. Baths last 40 minutes alone or 20 minutes before another treatment, by advance reservation, for guests 18 and over.
Roystone Hot Springs
A family-run hot springs RV park near Sweet with an outdoor pool under a vaulted roof and a jetted hot tub, each rented to one group at a time. The pool is about 98°F in winter and cooled in summer, and the hot tub runs about 104°F. The property is alcohol-free outside the Spring House event area.
Ruby Valley Hot Springs (Smith Ranch Hot Springs)
A group of clear spring pools in Ruby Valley, about 60 miles from Elko, between Ruby Lake National Wildlife Refuge and Franklin Lake Wildlife Management Area. The largest pool is about 30 feet across and sits around 100°F, but some nearby springs are scalding. The last miles are rough dirt roads where four-wheel drive is recommended, and Travel Nevada advises against winter trips.
Sacajawea Hot Springs
Primitive hot springs pools on the South Fork Payette River along Grandjean Road, just west of Grandjean and the Sawtooth Lodge. The Stanley-Sawtooth Chamber lists it among the springs west of Stanley on Highway 21.
Salida Hot Springs Aquatic Center
A city-owned indoor hot springs pool complex in Salida, built in 1937 as a WPA project and filled with geothermal water piped from springs near Poncha Springs. It combines lap swimming with hotter soaking pools and is promoted as one of the largest indoor hot springs facilities in the US. Hours change seasonally, so check the city calendar.
Saline Valley Warm Springs
A clothing-optional warm springs area with a primitive campground in a remote valley of Death Valley National Park, about 35 miles from the nearest paved road. Reaching it takes a high-clearance vehicle with all-terrain tires over North Pass (7,300 ft) or South Pass (5,997 ft). The Lower Springs have been closed since a September 2026 wildfire, while camping between Lower and Palm Springs stays open.
Sam's Family Spa Hot Water Resort
A family-run hot-water resort and RV park on Dillon Road east of Desert Hot Springs, with four chlorine-free mineral spas, swimming and wading pools, a dry sauna and two steam rooms. The spas are drained, cleaned and refilled every morning. Day passes cost $25 on weekdays and $30 on weekends, are sold first come, first served, and kids of all ages are welcome.
San Antonio Hot Springs
Hot water emerges from several sources on a steep hillside and flows into a series of primitive rock-lined pools of different temperatures. It is reached by a 0.7-mile out-and-back trail from a small parking area after 5 miles on Forest Road 376 (north). Check Santa Fe NF road alerts before going, as FR 376 had storm damage in late October 2026.
San Francisco Hot Springs
A few undeveloped pools beside the San Francisco River about 2 miles southwest of Pleasanton, reached by Trail #250 from a signed Forest Service trailhead off US 180. The trailhead is day use (dawn to dusk) with no fee. State tourism notes a second trailhead with a short, scenic hike to another soaking spot.
Sand Dunes Recreation
A family pool complex near Hooper in the San Luis Valley, fed by a 118°F artesian well first struck during 1930s oil drilling. Alongside the main pools it has an adults-only greenhouse soaking area, a restaurant and bar, and campsites and cabins. The whole facility closes on Thursdays for cleaning.
Saratoga Hot Springs (Inlet Park)
Three natural pools near Utah Lake, reached by a city-built path from the Inlet Park parking area in Saratoga Springs. The pools reach about 109°F and have muddy bottoms. Visit Utah notes swimsuits are required, alcohol is not allowed and the springs close daily at 10 pm.
Saratoga Hot Springs Resort
A historic resort in Saratoga with a 70-foot mineral pool at about 96-98°F and small teepee-covered hot pools at about 100-112°F. The pools are for overnight guests and members, though any spa treatment includes day use. On site are a brewery and pub, a restaurant and a golf course.
Sawtooth Lodge
A rustic lodge at Grandjean, founded as a hunting lodge in 1927 and run under a Forest Service special use permit, with a hot springs-fed pool. Cabin and yurt stays include pool access, and the restaurant serves breakfast, lunch and dinner with beer and wine.
Scenic Hot Springs
Privately owned, minimally developed hot springs in the Cascades about 10 miles east of Skykomish, reached by a steep 2-mile trail with 1,100 feet of gain. Visits are by advance reservation only, in daylight, and the two natural stone pools are unchlorinated and clothing optional. The two springs that feed them measure about 111-114°F and 118-122°F at the source.
Sea Mountain Nude Resort & Spa
A clothing-optional, adults-only resort for couples and women, with a heated mineral water pool, a whirlpool and a cedar sauna. Day visits run 10:30am to 5pm year-round, and couples passes start at $99. No one under 21 is allowed on the grounds.
Serpentine Hot Springs
Hot springs in Bering Land Bridge National Preserve, piped into an enclosed bathhouse next to a year-round bunkhouse and an unmaintained gravel airstrip. There are no roads, so most visitors fly in by air taxi, and in winter snowmachine trails are staked from Nome and Shishmaref. The site, known in Inupiaq as Iyat, has long cultural and spiritual importance.
Sespe Hot Springs
Remote hot springs and a hot creek at about 2,600 feet in the Sespe Wilderness, reachable only on foot or horseback. The Forest Service describes three routes: the Sespe River Trail from Piedra Blanca, the Alder Creek Trail from Dough Flat near Fillmore, and the Johnston Ridge Trail from Mutau Flat. It recommends spring visits, since summer temperatures can top 100F.
Sharkey Hot Springs
A BLM-developed site southeast of Salmon with two large concrete soaking pools filled by untreated natural spring water. It has two heated changing rooms, vault toilets, a fire pit with seating and an interpretive kiosk. Visitors 16 and older pay a use fee through a Recreation.gov pass bought before arrival.
Sheepeater Hot Springs
A riverside hot spring at Sheepeater camp, river mile 13.0 on the Middle Fork of the Salmon in the Frank Church-River of No Return Wilderness. The Forest Service lists it as one of six hot springs camps on the float; each permitted group may be assigned only one, and it is not guaranteed. The agency warns that some Middle Fork springs are hot enough to burn and bans soap in hot springs.
Shoshone Village (Shoshone Inn & RV Park)
A small desert village with an inn, RV park and campground around a naturally warm mineral spring swimming pool. Inn guests use the pool free, and it sits beside the RV park and a short wetland trail through endangered pupfish and vole habitat. Shoshone is about a mile from the southeast entrance to Death Valley National Park.
Sierra Grande Lodge & Spa
A downtown hot springs hotel run by Ted Turner Reserves with private mineral baths: three indoor and one outdoor bath under a pergola, with water up to 107°F. Walk-ins are welcome alongside hotel guests, and the spa offers massage, facials and body treatments. Book soaks and spa appointments by phone or in the lobby.
Sierra Hot Springs
A nonprofit hot springs retreat on more than 600 acres outside Sierraville, about 30 minutes north of Truckee. Its four soaking areas run from the 95-96F Phoenix Baths to the 110-112F Temple Dome Hot Pool, which sits under a geodesic dome with two cold plunges, and all soaking areas are clothing optional. Every visit needs an advance reservation and at least one member in the party, and stays are in the Main Lodge, the Globe Hotel or the campground.
Silver Creek Plunge
A family campground in the Boise National Forest about 25 miles north of Crouch, built around a 186,000-gallon geothermal pool that has operated since 1957. Water enters at 100-104F and the full volume turns over about every six hours. Lodging is rustic A-frames and cabins with no linens or showers, plus first-come tent and RV sites.
Skillern Hot Springs
A backcountry hot spring in the Sawtooth National Forest north of Fairfield, reached on foot by the Big Smoky Trail #072 from Canyon Transfer Camp on Big Smoky Creek. The Forest Service names it among the district's hot springs accessible in summer. NOAA lists the source at about 140F, so test the water before getting in.
Sky Valley Resort
An RV resort east of Desert Hot Springs whose sulfur-free hot water supplies 12 pools and spas, including a tub at about 104F. The pools are for resort guests, and no day pass is published. Its sister property, Caliente Springs, is a 55+ resort.
Slate Creek Hot Springs
A hot spring up Slate Creek off the Highway 75 corridor east of Sunbeam, toward Clayton. The Stanley-Sawtooth Chamber lists it (also called Hoodoo) among the springs north of Stanley.
Sleeping Buffalo Hot Springs & Resort
A Hi-Line resort just off US 2, 17 miles east of Malta, that began in the late 1920s as the American Legion Health Resort. A 3,200-ft artesian well feeds a 60 x 80 ft indoor pool (about 92F), a 128 x 60 ft outdoor pool added in 2025 (95-100F), hot tubs and a 48F cold plunge, all non-chlorinated and flow-through. Cabins, suites, an RV park, a steakhouse and a saloon are on site, with Nelson Reservoir across the road.
Snively Hot Springs
Undeveloped soaking pools on the banks of the Lower Owyhee River, where river rocks mix spring water of about 190°F with cooler river water. The BLM Vale District runs it as a free day-use site with a vault toilet and parking off Owyhee Lake Road. Camping is prohibited in and around the site.
Sol Duc Hot Springs Resort
A National Park Service concession resort in Olympic National Park's Sol Duc Valley, with three mineral pools from about 99 to 104°F and a freshwater pool. Day visitors buy 1.5-hour sessions, and pool use is included for cabin guests. The pools and cabins close each winter, from midday Nov 1 until March 20.
Solage, Auberge Resorts Collection
A resort on the Silverado Trail whose Spa Solage Bathhouse has five geothermal pools, from a 50-55°F cold plunge and an ambient magnesium pool to a 98°F relaxation pool and two jetted pools at 102-104°F. The signature Mudslide pairs a mud treatment with a private geothermal soak. The spa is 18+; non-guests can buy a Bathhouse Access Pass.
Soldier Meadows Hot Springs
A hot creek on BLM land at the north edge of the Black Rock Desert, dammed with rocks into a series of terraced pools, a couple of them large enough for groups. Travel Nevada gives water temperatures from the mid 90s to the low 100s F. Free semi-primitive BLM campsites and a first-come BLM cabin are nearby, about 60 miles of dirt road north of Gerlach.
Spa Hot Springs Motel & Tenderfoot Cabins
A motel on Main Street in White Sulphur Springs with three mineral pools: a new outdoor pool at about 103F, an older outdoor pool at 98F and an indoor pool at 105F. All three are drained and cleaned every night and refilled without added chemicals. The motel has 41 rooms and 12 cabins across the street, and guests swim free.
Spellbound Springs
A tiny-home village in Truth or Consequences with themed cottages and wagons, outdoor hot spring baths and wellness services. You must be a guest to use the baths; one cottage, Rosy's Oracle, has its own clawfoot hot spring tub.
Spence Hot Spring
A popular warm spring on a hillside above the Jemez River, reached by a short trail from a small paved lot on NM 4 about 7 miles north of Jemez Springs. The Forest Service says the spring has cooled over the years to roughly body temperature (listed at 95°F), and its small pool holds only a few people. It is day use only, nudity is cited under state law, and glass, camping and fires are banned.
Spencer Hot Springs
A cluster of springs on BLM land in the Big Smoky Valley southeast of Austin, where pipes feed spring water into two metal cattle-trough tubs and a soft-bottomed natural pool. The source runs around 130-140°F, and soakers set the tub temperature by moving the inflow pipe. There are no toilets, water or services; free primitive camping is allowed at least 100 yards from the water.
Splashland Hot Springs
A large outdoor geothermal swimming pool about a mile north of Alamosa, open in summer since 1955. Water enters at 102°F and averages around 88-96°F across the pool. It is geared to families, with slides, a diving board and lap lanes.
Stanley Hot Springs
Backcountry soaking pools in a clearing above the trail, fed by hot water flowing toward Huckleberry Creek. They are about five miles up Boulder Creek Trail 211 from Wilderness Gateway Campground on US Highway 12, past Huckleberry Flat and across Boulder Creek. The regional tourism office recommends late spring, summer or early winter.
Star Plunge
A family pool complex in Hot Springs State Park with indoor and outdoor mineral pools, water slides and a vapor cave, closed since Jan 14, 2025 after its concession agreement expired. On Jul 31, 2026 Wyoming State Parks announced a tentative settlement that would let a new long-term concessionaire reopen it, but no date has been set.
State Bath House (Hot Springs State Park)
A free bath house run by Wyoming State Parks in Hot Springs State Park, with an indoor and an outdoor soaking pool kept at about 104°F from springs that emerge at 128°F. The outdoor pool closed on Aug 24, 2026 for about a month while a pool lift, handrails and heated walkways were installed. The park around it has mineral terraces, the Swinging Bridge over the Bighorn River and the state bison herd.
Steamboat Hot Springs Healing Center & Spa
A small nonprofit bathhouse on South Virginia Street in south Reno, on a geothermal site used for bathing since the 1850s. Visitors book private mineral-bath rooms or an outdoor mineral tub with a cold plunge, filled with water pumped straight from the ground, and massage and spa treatments are offered alongside. Children under 12 are not admitted.
Strawberry Park Hot Springs
Rustic stone-lined pools in a forested valley about 7 miles from downtown Steamboat Springs, reached by a partly unpaved road that requires 4WD and winter tires from November through April. Visits are booked in 2-hour slots and paid in cash. Pools are clothing-optional and limited to adults after dark.
Summer Lake Hot Springs
A 145-acre resort on Highway 31 near Paisley with a 1929 wooden bathhouse holding a 15-by-30-foot indoor pool at 97 to 99°F, and outdoor rock pools averaging 104°F. The spring emerges at 113°F along the Slide Mountain fault. Soaking is only for guests staying in the cabins, houses, RV sites or tent field, and reservations are required.
Sunbeam Hot Springs
Hot springs that flow into the Salmon River beside Highway 75 north of Stanley, next to a historic bathhouse building dating from 1937. The Stanley-Sawtooth Chamber lists it among the soakable springs north of town.
Sunflower Hot Springs
A riverside hot spring at Sunflower camp, river mile 32.6 on the Middle Fork of the Salmon in the Frank Church-River of No Return Wilderness. The Forest Service lists it as one of six hot springs camps on the float; each permitted group may be assigned only one, and it is not guaranteed. The agency warns that some Middle Fork springs are hot enough to burn and bans soap in hot springs.
Surprise Valley Hot Springs
A small adults-only lodging on Highway 299 five miles east of Cedarville in remote Modoc County, where each of its 19 rooms has its own private mineral-water tub. Fifteen tubs sit on fenced outdoor patios and four are inside suites, and guests can adjust the temperature. There is no day use, no public pool and no food service on site, and all stays need a reservation with a two-night minimum.
Sycamore Mineral Springs Resort & Spa
A resort near Avila Beach built on sulfur mineral wells struck by oil prospectors in 1886. Its 24 private hillside hot tubs sit on wooden decks under sycamore and oak trees and are rented by the hour, from $25 per person on weekdays. A group lagoon with waterfalls and a mineral swimming pool are also bookable, and every guest room has its own mineral tub.
Sykes Hot Springs
Backcountry hot springs beside the Big Sur River in the Ventana Wilderness, reached on the Pine Ridge Trail from Big Sur Station. The Forest Service notes that several river crossings are required and can be impassable in winter high water. The trail and trailhead have been closed since August 2026 because of the Timber and Plaskett Fires.
Symes Hot Springs Hotel & Mineral Baths
A historic 1928 hotel in the town of Hot Springs with 48 rooms, cabins, apartments and RV sites. Outdoor mineral pools run from about 103F to 110F, with a waterfall between two of them and a 20 x 40 ft swimming pool, and the bath wing still has original clawfoot tubs in private stalls. The hotel also rents a jetted tub and steam room by the hour and offers massage.
Tassajara Zen Mountain Center
A San Francisco Zen Center monastery at the end of a 14-mile dirt road in the Ventana Wilderness, with a historic stone bathhouse on the hot springs. The baths have indoor and outdoor plunges, steam rooms and a sauna; they are clothing-optional and separated by gender. Guests visit only in the summer season, from late April to early September, by reservation.
Tecopa Hot Springs & Campground
An Inyo County park in the Tecopa Valley with two bathhouses, each with separate enclosed pools for men and women, fed by artesian water of about 102F. Bathing is in the nude only, under a county code. A concessionaire took over under a 10-year agreement and sells $15 day soaking passes, plus more than 200 RV and tent sites.
Tenakee Springs Bathhouse
A public bathhouse in the middle of Tenakee Springs, a village on Chichagof Island that grew up around its 106-107°F sulfur mineral spring. A volunteer Bathhouse Committee runs it, and men and women bathe at separate set hours. Entry is by donation, and the town is reached by Alaska Marine Highway ferry or scheduled air service.
TenZen Springs & Cabins
Six minimalist cabins on a 100-acre property in Home Valley outside Stevenson, each with a private two-person infinity tub fed by geothermal water drawn from 3,000 feet below the Wind River. The water flows continuously through each tub and its temperature can be adjusted. It's for overnight guests only, and state tourism describes it as adults-only.
TePee Pools
A commercial mineral-water pool complex in Hot Springs State Park with an indoor pool and water slide, an outdoor pool at 94-98°F and hot tubs up to 105°F. It also has a steam room and a cedar dry sauna. The site lists Carson Hot Springs and Jemez Hot Springs as sister properties.
Terrace Lakes Resort
A golf resort in Garden Valley with an outdoor geothermal pool open year-round to day visitors without reservations. The resort also has a restaurant and lounge, motel rooms, cabins, condos and RV spots. Drinks bought on site can be taken to the pool area with a wristband.
Terwilliger (Cougar) Hot Springs
Four rock-lined pools step down a forested ravine off the Aufderheide Scenic Byway south of Blue River, from about 112F at the top to 85F at the bottom. The Forest Service charges $12 per person for two hours, and the site is day use only. Alcohol and pets are prohibited, and clothing is optional.
The Lava Hotel & Spa
A Main Street hotel in Lava Hot Springs, formerly Aura Soma Lava, with rooms, vacation rental homes and a conference center. The hotel lists an on-site hot springs pool and a massage studio.
The Oasis at Death Valley
A pair of hotels at Furnace Creek in Death Valley National Park, the Inn and the Ranch, each with a spring-fed swimming pool held at about 87F. The Ranch pool is open 8am-11pm to guests of both hotels, and the public can buy pool passes at the Ranch desk. The Inn's historic tiled pool is for Inn guests and sits beside a spa and poolside cafe.
The Omni Homestead Resort & Spa
A large historic resort in Hot Springs whose spa garden centres on the Octagon Pool, fed by two hot springs at 96-97°F, alongside a heated infinity pool, a 103°F hot tub and a Finnish sauna. The Serenity Garden is for ages 18 and up and sells a limited number of day passes to non-guests. The resort also runs the Allegheny Springs water park, fed by its springs, and owns the historic Warm Springs Pools five miles north.
The Spa at Séc-he (Agua Caliente Cultural Plaza)
A 73,000 sq ft spa in downtown Palm Springs on Séc-he, the Agua Caliente Hot Mineral Spring that the Agua Caliente Band of Cahuilla Indians has cared for over generations and still treats as one of its most important cultural resources. The day pass includes a 15-minute private mineral bath in roughly 105°F spring water, plus steam, sauna and a pool deck. It is part of the tribe's Cultural Plaza alongside the Agua Caliente Cultural Museum; guests must be 18 or older.
The Spring Resort & Spa
A small adults-only (18+) inn and day spa on Miracle Hill with three mineral pools: an enclosed soaking pool, a 104°F outdoor pool and a larger swimming pool. Day visitors get two hours in the pools and Finnish sauna with a spa treatment of 50 minutes or more. The resort can reach capacity and turn away day use on weekends and holidays.
The Springs
A geothermal soaking venue on Highway 21 about a mile south of Idaho City, with an 80 by 40 ft main pool, a hot tub and private tubs. All visits are by reservation in 2.5-hour sessions, and several days and evenings are adults-only. Poolside food, beer and wine are served, and the owners run Inn The Pines lodging a third of a mile away.
The Springs Resort
A large riverside resort in downtown Pagosa Springs whose 47 terraced pools draw from the Mother Spring. General admission covers 25 original pools including an adults-only terrace, and a pricier wellness pass adds newer pools, a halotherapy sauna and a mud studio. Overnight guests get round-the-clock soaking.
Trail Creek Hot Springs
Creekside pools about 19 miles from Cascade on the Warm Lake road, reached by a short, steep descent from a roadside pullout. Some pools are reinforced with concrete, and pipes let cold creek water in to adjust the temperature. Visit Idaho features it as a winter soak, when the path down is snow-covered.
Travertine Hot Springs
Hot springs and soaking tubs on BLM land off Jack Sawyer Road just southeast of Bridgeport, managed by the Bishop Field Office. The site has a long history with the region's Native people, and BLM has closed it to all public access for Tribal ceremonial use (Oct 30-Nov 6, 2024). BLM's closure map shows a gated access road, a parking lot and a trail to the tubs.
Trinity Hot Springs
A members-club hot springs resort near Featherville on the South Fork Boise River, formerly known as Paradise Hot Springs. One fenced geothermal pool runs about 95-108°F in summer and 90-95°F in winter, booked in 2-hour slots. At least one person per party needs a $35 annual membership; lodging guests get pool access.
Turkey Creek Hot Springs
Springs deep in the Gila Wilderness that reach about 165°F at the source and are cooled by Turkey Creek. State tourism says rock-lined pools are built here but often wash out, and a larger swimming hole with warm seepage gives a more reliable soak. Getting there takes a tough drive and a hike, and it is well known, so expect company.
Tuscan Springs Hotel & Spa
A 16-room adults-only (21+) boutique hotel with a large hot mineral pool and two mineral jacuzzis fed by a 350 ft well. Day visitors can use the pools and dry sauna for four hours for $50. Pool use is free with any treatment at the on-site La Bella Spa.
Twin Peaks Lodge & Hot Springs
A 93-room lodge in Ouray built around a 156°F spring that feeds indoor and outdoor pools held at roughly 101-106°F. Day passes are sold at the front desk until 4 pm, with a thermal cave available for an extra fee. Hotel guests soak daily from 8 am to 10 pm.
Two Bunch Palms
An adults-only resort on Two Bunch Palms Trail whose grounds center on a mineral-water grotto fed by a local aquifer that the resort says emerges at over 100°F. Day visitors can buy a Mineral Soak Day ($165, 9am-6pm, lunch included) or an evening soak with dinner. Guests must be 18 or older, and pets are not allowed.
Umpqua Hot Springs
A travertine soaking tub on a bare rock face about 150 feet above the North Umpqua Wild and Scenic River, reached by a steep 0.3-mile trail. Water seeps from an active fault at 100 to 115°F, and an open-air roof shelters the tub. The Umpqua National Forest manages it as a day-use-only fee site and warns of high use and nudity.
Upper Frisco Hot Springs
A spring on the upper San Francisco River in the Gila National Forest, reached from the Forest Service's Upper Frisco Hot Springs trailhead on Frisco Divide Trail #124. The trailhead is at the end of Forest Road 35, 12.3 miles off US 180 between Reserve and Luna. The Forest Service does not publish the hike distance or pool details.
UpValley Inn & Hot Springs
A Lincoln Avenue hotel, formerly a Comfort Inn, whose outdoor swimming pool and whirlpool are filled with mineral water from its own geothermal well. A cedar dry sauna and steam room are included with the pool. Non-guests can buy a day pass through ResortPass.
Valley View Hot Springs
Natural ponds and pools on a hillside above the San Luis Valley, run as a nonprofit by the Orient Land Trust. The whole property is clothing-optional and family-friendly, and daily visitor numbers are capped, so reservations by phone are needed. Cabins and campsites are available, and leashed pets are allowed on camping and day-pass reservations for a fee.
Verde Hot Springs
The ruins of a once-famous resort on the Verde River, reached by a short hike upstream and some wading from the Childs dispersed camping area. The last 6 miles to Childs on FR 502 are very rough, and the Forest Service highly recommends high clearance. There is no fee, potable water or garbage service.
Veyo Pool
A spring-fed swimming pool in a basalt canyon in Veyo, north of St. George. Spring water enters at about 96°F and cools to the high 80s in the pool. The $18 canyon pass also covers a bolted climbing park and crawdad catching, and the pool is open May through October.
Vichy Springs Resort
A historic resort and country inn in the hills east of Ukiah, operating since 1854 and listed as California Historical Landmark #980. Its signature is 14 tubs of naturally carbonated mineral water at about 90F, alongside a 104F hot pool and a seasonal 25-meter swimming pool. Day visitors pay by 2-hour, 3-hour or all-day blocks and can use trails on the 700-acre reserve; bathing suits are required.
Virgin Valley Warm Springs
A warm spring pool beside the Virgin Valley Campground in the Sheldon National Wildlife Refuge in far northwestern Nevada. Travel Nevada says the pond stays around 90F, and the refuge lists a rustic shower house, pit toilets and drinking water. Camping is free and first-come, first-served, with a 14-day limit.
Vulcan Hot Springs
A geothermal area on Vulcan Creek in the Boise National Forest, reached on Vulcan Hot Springs Trail #072 from the Tyndall / Vulcan Trailhead. The trailhead has a vault toilet and five dispersed campsites but no drinking water. The source springs are near boiling, so soaking is only possible where creek water has cooled them.
Wall Creek Warm Springs (Meditation Pool)
A single warm pool beside Wall Creek, reached by the level Warm Springs Trail #3582 through old-growth forest north of Oakridge. The Forest Service lists the pool at about 95°F, roughly 10 by 12 feet and 3 feet deep with a silty bottom. The trailhead is currently closed under the Cedar Creek Fire closure order.
Warm Mineral Springs Park
A city-run park in North Port built around a natural spring that the city says averages 85°F year-round and bills as Florida's only natural warm spring. The historic building complex has been closed since hurricane damage, so visitors use a temporary admissions building and a restroom trailer while a $16.7 million rehabilitation that began in July 2026 proceeds. Admission is sold per day, with lower rates for North Port and Sarasota County residents.
Warm Springs Pools (Jefferson Pools)
Two historic wooden bathhouses in Warm Springs built over spring pools that stay at about 98-99°F, owned and run by the Omni Homestead about five miles from the resort. Soaks are 50 minutes and booked on the hour, with set times for families, co-ed adults and single-gender adult soaking. The Gentlemen's pool is about 6 ft deep and the Ladies' about 5 ft.
Warner Springs Ranch Resort
A historic ranch resort in the Warner Valley of north San Diego County built around the Warner Hot Springs. The resort's own site lists the hot mineral pools, casitas, spa, dining and golf as closed for remodeling, with only the gas mart open. No reopening date has been published.
Waunita Hot Springs Ranch
A long-established guest ranch about 27 miles east of Gunnison built around a large hot-spring-fed pool. It mainly hosts family reunions, weddings and group retreats. Whether outside visitors can soak was not confirmed on the official site.
Weir Creek Hot Springs
An undeveloped hot spring above Weir Creek near milepost 142 of US Highway 12, with its main pool on a rock slab overlooking the creek. It is about a half-mile uphill walk from the highway. The Nez Perce-Clearwater National Forests closed the site at night in 2022 after injuries and vandalism, and the regional tourism office now lists it as closed until further notice.
White Sulphur Springs
A Forest Service bathhouse and public-use cabin on Bertha Bay, on the outer coast of Chichagof Island in the West Chichagof-Yakobi Wilderness, about 65 miles northwest of Sitka. Boaters anchor at Mirror Harbor and walk a fairly level 0.9-mile trail, or skiff in from Porcupine Bay. The cabin sleeps four and is reserved on Recreation.gov.
Wiesbaden Hot Springs Spa & Lodgings
A historic lodge in Ouray built over a natural vapor cave where a hot spring cascades over rock into a 108°F soaking pool. Day visitors can buy 2-hour passes on-site for the cave and outdoor pool when capacity allows, and the screened private Lorelei pool can be reserved. Guests must be 12 or older.
Wilbur Hot Springs
An off-grid, solar-powered hot springs hotel on Sulphur Creek in western Colusa County, surrounded by a 1,560-acre nature preserve. Untreated mineral water flows continuously through flumes in a Japanese-style Fluminarium at about 100 to 109F, and the bathing area is clothing optional and device free. Confirmed reservations are required for both day use and overnight stays, and only guests 13 and older are admitted.
Wild Horse Hot Springs
A rustic, off-grid soaking site outside the town of Hot Springs with communal outdoor plunges fed by the Mother Dragon artesian well. The plunges are chemical-free and continuously refreshed, and soakers can open hot-water valves to adjust the temperature. Rustic cabins and tipis share a bathhouse; there is no restaurant, so bring food and water.
Wild Willy's Hot Springs (Crowley Hot Spring)
Undeveloped hot pools on BLM land in Long Valley, reached by a dirt road off Benton Crossing Road and a short boardwalk walk from the parking area. The BLM and Mono County maintain and rerouted the access road, which the BLM says carries more than 500 vehicles on busy days. Mono County notes that natural pools like this are not maintained and asks visitors to pack out what they bring.
Willett Hot Springs
Primitive hot springs in the Sespe Wilderness, about 9 miles east of Piedra Blanca Trailhead on the Sespe River Trail and then 0.6 mile past Willett Camp. The area is open only to foot and horse travel, and parking at the trailhead requires a recreation pass. The Forest Service lists it among the four hot springs on Los Padres open to visitors.
Willow Creek Hot Springs (Whitehorse Hot Springs)
A remote hot spring in the Trout Creek Mountains area of southeast Oregon, also called Whitehorse Hot Springs. Travel Oregon lists it near the Willow Creek Campground with a Fields address, and a BLM district map labels the spring. No official source publishes its temperature, facilities or road conditions.
Worswick Hot Springs
A hot spring on the Sawtooth National Forest's Fairfield Ranger District that the Forest Service calls popular and places close to the free Five Points Campground, 17 miles north of Fairfield on FR 094. NOAA lists the source at about 180F, scalding at the vent, so check the temperature of any pool before entering.
Yampah Spa & Vapor Caves
A spa built over natural underground steam caves heated by a 125°F geothermal spring, with three rock chambers that run around 110-113°F. Cave time is bundled with spa treatments and must be reserved ahead. Swimsuits are required and visitors must be at least 13.
Yellowstone Hot Springs
A soaking complex on the Yellowstone River at Corwin Springs, eight miles north of the park's North Entrance. Three flow-through mineral pools include a 103-105F hot pool, a 98-100F main pool with alcoves and a 60-65F cold plunge. Cabins and suites are available year-round, RV and tent sites May to October, and the site is alcohol-, tobacco- and pet-free.
Zims Hot Springs
Two outdoor pools a few miles from New Meadows in the Meadows Valley, filled with mineral water from an artesian well and operated by the Nez Perce Tribe. The smaller soaking pool runs about 100-105F and the larger swimming pool about 90-100F. The site also has RV parking, a campground, a light snack bar and arcade games.
Zion Canyon Hot Springs
A WorldSprings resort that opened in 2025 on the historic Pah Tempe (Dixie) hot springs along the Virgin River in La Verkin. It splits into a family side with 14 mineral pools and a 90°F freshwater pool, and a 21+ side with 18 mineral pools, 16 WorldSprings-style pools, saunas, cold plunges and a bar. Standard passes cover up to three hours, with an all-day upgrade.