Arizona Hot Spring
- Free
- 2.5 mi hike
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.
Trails also close outside the season when Willow Beach forecasts reach 95°F or flash floods are possible.
- Price
- Free
- Nearest town
- Boulder City, NV
- Hike (one way)
- 2.5 mi
Plan your visit
Hours & season
| Season |
|
|---|
Tickets & booking
| Price |
|
|---|---|
| Access | Free public access |
Rules
| Dogs | Yes |
|---|
On site
| Lodging | No |
|---|---|
| Land manager | NPS |
Not stated by the land manager: swimwear, ages, camping nearby.
Soak responsibly
- Pack out everything, including food scraps and toilet paper. Use WAG bags where required.
- No soap, shampoo or sunscreen in the pools; rinse away from the water.
- Check permits and closures with NPS before you go.
- Keep groups small and give others space. Respect posted dog and camping rules.
Water temperature
This venue doesn't publish pool temperatures.
Mineral profile
Total dissolved minerals
2,850 mg/L
Highly mineralized · Sodium–chloride (salty, brine-like water)
- pH
- 7.7
- Temp at source
- 97°F
- Lithium
- 0.53 mg/L
- Fluoride
- 2.5 mg/L
- Boron
- 1.1 mg/L
- Iron
- 0.01 mg/L
Lab analysis of the source water at “B-30-23 26bcc1”, sampled 2008–2019 by the USGS and partners (data). Pool water may be cooled, mixed or treated, and spring chemistry is generally stable over decades. We report measurements only; we don't make health claims.
What's here
- slot canyon below Hoover Dam
- 20-ft ladder on the route
- also reachable from the Colorado River
- pit toilets near the river
- trail closed May 15-Sept 30
Getting there
| Elevation | 981 ft |
|---|---|
| Road |
|
| Hike | 2.5 mi one way, about 750 ft of climbing |
| Trail |
|
| Parking |
|
Things to do near Boulder City, NV
White Rock Canyon Trail
Alternate strenuous route from the same trailhead; also closed May 15-Sept 30.
Lake Mead National Recreation Area
Lakes, marinas and desert trails around the Colorado River reservoirs.
Campgrounds
- Hemenway Campground6 mi
- Boulder Beach Campground6.8 mi
- Callville Bay Campground12.4 mi
- Temple Bar Campground22.9 mi
Trailheads
Straight-line distances. Campground and trailhead data © OpenStreetMap contributors.
Nearby springs
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.
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.
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.
Gold Strike Hot Springs: 3 mi · Death Valley Hot Springs: 84 mi · Tecopa Hot Springs & Campground: 85 mi
Sources (6)
· checked November 2026
Prices, hours and rules are checked against the official site and land-agency pages. Spot something out of date? Let us know.