WYOMING, UNITED STATES

Mammoth Hot Springs

Ever-changing limestone terraces in Yellowstone.

Hydrothermal terrace formations; bathing is prohibited — Mammoth Hot Springs

Mammoth terraces and boardwalk at sunrise; bathing is prohibited — Mammoth Hot Springs

Mammoth Hot Springs (official website; photographer not specified) · Rights reserved

Water temperatureVariesCheck individual pools

ExperienceThermal parkGeothermal sightseeing; no soaking in the terraces

AdmissionNational park entryCheck current fees before visiting

When to goCheck park road conditions

GET TO KNOW THE PLACE

A little more about Mammoth Hot Springs.

Mammoth Hot Springs in Yellowstone is a geothermal sightseeing destination. The National Park Service prohibits soaking in its fragile travertine features; plan a terrace walk or scenic drive instead.

This is a viewing destination. Bathing in the thermal features is prohibited. Stay on boardwalks: thin crust can conceal boiling water.

What you’ll find

BoardwalksVisitor center

Is this your kind of spring?

Official sources reviewed 2026-10-18 · Editorial recommendations

Choose Mammoth for geothermal scenery. Bathing in the terraces is prohibited.

A good fit for

Visitors interested in geothermal landscapes

Consider another option for

Travelers seeking a bathing pool

See the terraces from designated routes

NPS describes boardwalk walks and the Upper Terrace Drive. The terraces continually change as hot water deposits travertine. Stay on designated routes rather than approaching the features.

NPS: Mammoth terraces and visitor planning ↗

Plan around the season

Our planning suggestion

The park describes the Upper Terrace Drive as a summer-season route. Our suggestion: check current road conditions and ask the Albright Visitor Center about routes that suit your group.

NPS: Mammoth terraces and visitor planning ↗