Hot Springs State Park in Thermopolis, Wyoming, is built around one of the largest mineral hot springs in the region, where water flows in vast volume over colorful terraces beside the Bighorn River. The park is managed by Wyoming State Parks, Historic Sites & Trails and includes a free State Bath House open year-round. For RV travelers crossing central Wyoming, it is a free, full-service stop with terraces, trails, and a swinging footbridge.
Best season — Year-round (the State Bath House stays open all year)
At a glance
The facts worth checking before you roll out
Conservative, source-minded facts for planning your visit — always worth confirming against current conditions before you travel.
State
Wyoming
Town
Thermopolis
Managed by
Wyoming State Parks, Historic Sites & Trails
Spring temperature
~128°F at the source
Flow
More than 1.8 million gallons over the terrace per 24 hours
Bath House
Free; water held at ~104°F; open year-round
On the ground
Wyoming State Parks describes more than 1.8 million gallons flowing over the mineral terrace every 24 hours at a constant 128 degrees Fahrenheit, building the colorful terraces that step down toward the Bighorn River. The free State Bath House holds its water at about 104 degrees and stays open year-round, closing only on Thanksgiving and Christmas Day.
Beyond the bath house, the park strings together easy attractions: the swinging footbridge — a suspension bridge across the Bighorn River — frames views of the river and the mineral terrace, and the grounds invite an unhurried walk among the steaming travertine.
Because Thermopolis sits along central Wyoming's highways, the park makes a convenient and free stop on a longer Wyoming RV route. Confirm current State Bath House hours and any seasonal notes on the official Wyoming State Parks page before you arrive.
Official sources
- Wyoming State Parks — Hot Springs State Park State parks agency
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Planning an RV trip near Hot Springs State Park, Thermopolis: A Wyoming RV Guide?
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