Updated ·
Hot Springs State Park Bath House — Free soaking · donation encouraged in Thermopolis, WY (2026)
Geodesic dome encloses ADA-accessible indoor and outdoor pools fed by the world’s largest mineral hot spring, complete with boardwalks over rainbow terraces.
Temperature
104°–110°F
Pools
2 soaking pools
Best season
Year-round
Reservations
Walk-up friendly
Dog policy
No pets at pools
Family policy
Family windows available
Safety notes
- Each soak is limited to 20 minutes—plan for multiple rotations if you want more time.
- The outdoor deck can be icy in winter; wear sandals with grip.
Amenities & etiquette
FAQ
Plan more in Wyoming
Want a full itinerary? Start with the state hub, then browse the best-of and free-soaking guides tailored for each season.
Nearby hot springs
Astoria Hot Springs Park
Jackson, WY
A nonprofit-run soaking campus on the Snake River with six terraced mineral pools, ADA access, snack shack, and quiet zones framed by the red Astoria Bridge.
Granite Hot Springs Pool
Jackson, WY
A concrete soaking pool perched above Granite Creek Falls at the end of a 10-mile forest road, pairing waterfall views with rustic changing rooms and adjacent campsites.
Hobo Hot Springs
Saratoga, WY
A mix of cement pools and natural river eddies in downtown Saratoga, steps from local cafes and the town campground.
Saratoga Hot Springs Resort
Saratoga, WY
A 1950s-era western lodge with a 70-foot mineral pool, teepee-covered private tubs, Snowy Mountain Brewery, and a nine-hole public golf course on the banks of the North Platte River.