About

Every Hot Spring lists 2,150 natural hot springs in 26 states. It exists because the public records of where hot water comes out of the ground are scattered across government databases that were never meant to be read by someone planning a weekend.

Where the data comes from

The backbone is the NOAA National Centers for Environmental Information (NCEI) Geothermal Springs database, a U.S. government survey of thermal springs with coordinates and surface temperatures. That dataset is public domain.

Names, nearby towns, and some access details are cross-checked against OpenStreetMap, whose data is © OpenStreetMap contributors and licensed under the Open Database License (ODbL). Where a spring has a Wikipedia article, a short factual description may be drawn from it.

Springs marked "human verified" have been checked by a person against at least one recent source. Everything else is a survey record that may be decades old.

What the fields mean

• Source temperature is the hottest recorded reading at the spring's outlet, not a soaking pool.
• Access is public land, resort or commercial, or private property, as last recorded. Unknown means no source states it.
• Fee and clothing optional are left blank unless a source says otherwise. We never guess.
• Nearby springs are other listings within 50 miles as the crow flies, which can be a very long drive.

Corrections

If a spring has closed, moved behind a gate, or is listed in the wrong place, we want to know. Corrections with a source (a land-agency notice, a ranger district page, a recent photo) are applied first.

Advertising and affiliate links

The site may show ads and may link to lodging or gear through affiliate programs. Those links are marked as sponsored and never affect which springs are listed or how they are described.