Hot Springs State Park

About Hot Springs State Park

Tucked into the high desert canyon country of north-central Wyoming, Hot Springs State Park in Thermopolis offers something genuinely rare: a place where the earth exhales warmth year-round, where mineral-laden water bubbles up from deep underground and flows freely into pools open to every visitor at no charge. This is not a manufactured spa experience — it is geology made personal, a living landscape shaped by centuries of mineral deposition, rising steam, and the quiet power of thermal water finding its way to the surface.

The Setting and Landscape

The park is anchored by the Big Spring, one of the world's largest mineral hot springs, which pours out a steady flow of brilliantly colored water across pale travertine terraces that cascade toward the Bighorn River. The formations glow in shades of cream, ochre, and rust — mineral architecture built one thin layer at a time over thousands of years. In winter, steam lifts off the terraces in slow, theatrical columns, and the contrast of snow-dusted ground against the warm-colored rock is otherworldly. Come summer, cottonwoods and willows soften the canyon edges with green, and the park feels lush and surprisingly intimate for Wyoming's wide-open scale. Keep your eyes open: a resident bison herd roams the park grounds, and sightings are common enough to feel like part of the visit rather than a lucky bonus.

The Soaking Experience

The hot springs themselves register at around 104°F — warm enough to unknot tight muscles and slow the pace of a rushed afternoon. The water is mineral-rich and silky against the skin, carrying the faintly sulfurous edge that marks genuine geothermal springs. This is therapeutic soaking in the old-fashioned sense, the kind of experience that drew Native American tribes to this valley long before European settlement, and later drew homesteaders, ranchers, and travelers seeking relief from hard physical lives. You ease in, the heat rises around you, and the rest of the world gets considerably quieter. The park manages the flow of the Big Spring and maintains access to bathing facilities that accommodate visitors of all abilities, making this one of Wyoming's most accessible natural experiences.

Practical Visit Information

Hot Springs State Park is a day-use destination — there is no camping on-site, so plan accordingly. Entry is free, though donations are gratefully accepted. The park is accessible year-round via Route 20, and every season offers its own reward: wildflowers in spring, deep green shade in summer, warm amber tones in autumn, and the dramatic steam-and-snow theater of winter. Full facilities are available on-site, making this a comfortable stop for families, solo travelers, and anyone in between. If you have extra time, the nearby Legend Rock petroglyph site is well worth the detour — hundreds of ancient carvings etched into sandstone that connect the landscape to its deep human history.

Plan Your Visit

Hot Springs State Park sits within the town of Thermopolis, which provides lodging, dining, and services for visitors. Casper lies roughly two hours to the southeast and Riverton about an hour to the south, both offering additional accommodation options and easy highway connections. Whether you're passing through the Wind River country or making this your destination, the springs of Thermopolis reward the effort generously.