15 springs within 40 miles
Hot springs near Middletown
15 hot springs are within 40 miles of Middletown: the closest is Harbin Hot Springs (under 1 mi), the hottest is Wilbur Hot Springs (up to 109°F), and the lowest listed adult price is Morton's Warm Springs ($23). Distances are straight-line; driving distances in the mountains can be much longer.
- Harbin Hot Springs0 mi
- Calistoga Motor Lodge and Spa14 mi
- Calistoga Spa Hot Springs15 mi
- Dr. Wilkinson's Backyard Resort & Mineral Springs15 mi
- Golden Haven Hot Springs Spa and Resort15 mi
- Indian Springs Calistoga15 mi
- Meadowlark Country House and Resort15 mi
- Mount View Hotel & Spa15 mi
- Roman Spa Hot Springs Resort15 mi
- Solage, Auberge Resorts Collection15 mi
- UpValley Inn & Hot Springs15 mi
- Wilbur Hot Springs21 mi
- Morton's Warm Springs28 mi
- Fairmont Sonoma Mission Inn & Spa34 mi
- Vichy Springs Resort38 mi
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.