Thermopolis Hot Springs Soakable

Thermopolis Hot Springs reads 133°F at the source (NCEI, historical reading); the pools people soak in usually run cooler than the source. Managed by Hot Springs State Park (Wyoming State Parks, Historic Sites & Trails) (checked 2026-08-19).

Cool Warm Hot Boiling-class 133°F

133°F / 56°C

Hot range at the source — hotter than a hot tub

Reading from the NCEI Thermal Springs List (historical reading, 1981 compilation). Source temperature — lower pools usually run cooler.

Water temperatures change with flow and season — test before entering, and never submerge your head in warm natural water. CDC guidance on Naegleria fowleri.

Access

Hot Springs State Park sits on colorful mineral terraces along the Big Horn River at Thermopolis; Wyoming State Parks states that more than 1.8 million gallons flow over the terrace every 24 hours at a constant temperature of 128 degrees Fahrenheit. Public soaking is at the park’s State Bath House, where the mineral water is maintained at 104 degrees for therapeutic bathing. The park is day use only, with 6.2 miles of universally accessible and hiking trails, picnic areas and group shelters, and a suspension footbridge the park calls “The Swinging Bridge.”

Trailhead: State Bath House, Hot Springs State Park, Thermopolis

Winter: Open year-round. The park posts winter State Bath House hours of Monday–Saturday 8 a.m. to 5:30 p.m. and Sunday noon to 5:30 p.m., with the bath house closed Thanksgiving and Christmas Day.

Access notes read from the manager's own page, checked 2026-08-19.

Worth knowing: The State Bath House is the park’s public soaking facility; Wyoming State Parks states that “The park has a free bath house where the water is maintained at 104 degrees for therapeutic bathing.” Other pools inside the park are run by commercial concessionaires and are outside this directory’s scope.

Check current conditions with Hot Springs State Park (Wyoming State Parks, Historic Sites & Trails)

Nearby springs

Identity, coordinates, and temperature quoted from the NCEI Thermal Springs List (historical reading, 1981 compilation).