Hot springs in the United States
1,391 thermal features catalogued across 34 states · 871 with detail pages
Our hot-springs index covers 1,391 thermal features — hot springs, warm springs, geysers, and boiling springs — with USGS GNIS as the spine and OpenStreetMap layered on top for the visitor-info detail (operator, fee, hours, bathing rules, water temperature) wherever OSM contributors have tagged it. Coverage is heavily concentrated in the Rocky Mountain, Great Basin, and Cascades regions: Wyoming, Nevada, Idaho, California, Oregon, and Colorado together hold over 75% of the catalogue. East-coast states have very few thermal features by geology; Hot Springs National Park (Arkansas) is the famous exception.
GNIS catalogs the geographic feature, not its access status. Many of these are on federal land (NPS, Forest Service, BLM); some are on state land; some are private resorts; some are wild and undeveloped. Always verify access and soaking rules with the relevant land manager before visiting. In NPS units (Yellowstone in particular), soaking is prohibited and leaving the boardwalk is illegal.
Top states by hot-spring count
| State | Total catalogued | With detail page |
|---|---|---|
| Wyoming | 642 | 606 |
| Nevada | 163 | 30 |
| Idaho | 112 | 40 |
| California | 109 | 57 |
| Oregon | 68 | 22 |
| Colorado | 53 | 14 |
| Arizona | 38 | 16 |
| New Mexico | 31 | 8 |
| Utah | 30 | 9 |
| Montana | 28 | 14 |
| Alaska | 27 | 0 |
| Washington | 21 | 18 |
| Texas | 13 | 5 |
| Tennessee | 7 | 6 |
| Kentucky | 6 | 5 |
Browse by state
Click any state to see all hot springs in our database for that state, plus which cities they're reachable from. Empty cells mean no thermal features were catalogued in our source data — mostly the eastern Plains and Great Lakes regions.
Top cities for hot-springs trips
Cities with the most hot springs within a 75-mile drive. Useful for planning a soaking-focused weekend.
Bozeman
Drive-time and access notes for hot springs reachable from Bozeman.
Boise
Drive-time and access notes for hot springs reachable from Boise.
Reno
Drive-time and access notes for hot springs reachable from Reno.
Seattle
Drive-time and access notes for hot springs reachable from Seattle.
Las Vegas
Drive-time and access notes for hot springs reachable from Las Vegas.
Colorado Springs
Drive-time and access notes for hot springs reachable from Colorado Springs.
Bakersfield
Drive-time and access notes for hot springs reachable from Bakersfield.
Oxnard
Drive-time and access notes for hot springs reachable from Oxnard.
What's in a RoamFound hot-spring page
Each hot-spring page shows the practical stuff — type (hot spring / warm spring / geyser / boiling spring), state, county, GNIS feature ID, coordinates, nearest documented metro with drive-time, NPS-unit affiliation if applicable, and a clear safety & access block. Where the feature is inside a National Park or other federal unit, we link to the relevant land-manager page directly.
Where OSM contributors have tagged the feature with developed-feature metadata, an "Operations & visitor info" block surfaces what we know: operator name, posted hours, bathing rules (allowed or prohibited), fee status, clothing-optional flag, water temperature, website, and phone. Wikipedia extracts and Wikimedia Commons photos are layered on the famous features. Where the underlying sources are sparse, the page is short — we don't pad with AI fluff.
Coming next
Wikipedia summaries, Wikimedia photos, and the OpenStreetMap natural=hot_spring visitor-info layer are now live across the catalogue. Pending enrichment:
- U.S. Forest Service ranger districts — for hot springs in national forests, which is most of the wild ones in the West.
- Bureau of Land Management — for Nevada, Oregon, and Idaho hot springs on BLM land.
- NPS
/alertsAPI — surface "boardwalk reroute" / "fire-related closure" notices on Yellowstone, Hot Springs NP, Lassen, etc.
Other categories now live: waterfalls and hiking trails. Subscribers to the launch list (homepage) get notified as new categories and enrichment land.