Researched & maintained by Chester Beard · Conservation Photographer · Sierra Club, The Nature Conservancy
Data from USGS, OpenStreetMap, NOAA · Disclosure
There are four reliable ways to find natural hot springs in the US — from curated maps with verified locations to government geothermal databases. Soak Trail maps 686 springs across 8 western states; here's how to find them and verify they're legal to visit.
The four methods:
Here's how to use each one.
The fastest way to find a hot spring is a map that's already done the legwork of confirming a location is real, roughly locatable, and worth the trip. Soak Trail's locator map covers 515 mapped natural springs across 12 states in six regions:
| Region | States | Springs mapped |
|---|---|---|
| Northern Rockies | Idaho, Montana, Wyoming | 260 |
| Desert | Arizona, Nevada, Utah | 92 |
| Shasta Region | Northern California, Southern Oregon | 64 |
| Washington | Washington | 46 |
| Colorado + New Mexico | Colorado, New Mexico | 46 |
| Alaska | Alaska | coverage in progress |
If you already know roughly where you're headed, Near Cities narrows that down to springs within driving distance of a specific town, and Trip Planner turns a shortlist into an actual itinerary. For the exact, current number of springs per state, see how many hot springs are in each state.
Beyond curated maps, the U.S. government maintains its own record of thermal springs — most of which were never developed for visitors and won't show up on a typical travel site. NOAA's National Centers for Environmental Information maintains a Thermal Springs dataset covering roughly 1,661 documented hot springs in the United States — a mix of visitor-ready and completely undeveloped sites.
That dataset tells you a spring exists. It doesn't tell you whether you're allowed to go. For that, cross-reference the location against:
A location existing in a database isn't the same as a location being open — always check land status before you go.
Reddit's r/HotSpringsWest and r/hotsprings, along with threads on outdoors.stackexchange.com, are genuinely useful for two things a static database can't give you: whether a road is currently passable, and whether a spring has gotten too crowded or too damaged to be worth visiting. They're a good second check after a map, not a replacement for one.
Most U.S. hot springs cluster along the same fault lines and volcanic belts that produce geothermal activity generally — the Cascades, the Rockies, and the Basin and Range province across Nevada, Utah, and eastern California/Oregon. That's why Soak Trail's regional breakdown is weighted toward those states.
It depends entirely on the state's geology — proximity to a fault line or volcanic activity is the deciding factor, not overall size or climate. Check the locator map or NOAA's Thermal Springs dataset directly for state-by-state coverage rather than relying on general assumptions.
Usually yes if they're on BLM or National Forest land with no posted closure, but always verify current status — some are seasonally closed, tribal land, or require a permit. See the land-status check in the section above.
Yes — that's what Soak Trail's locator is built for, alongside NOAA's official (but less visitor-friendly) Thermal Springs dataset.