About

Hot Springs Nation is an independent directory of U.S. hot springs. We are building it one state at a time, starting with Colorado.

How we research

We take practical details — fees, hours, reservations, clothing and dog policies — from, in order: the operator's official website, the U.S. Forest Service, the Bureau of Land Management, Colorado Parks and Wildlife, and Colorado tourism agencies. Each listing shows its source links and the date we last checked them.

If we cannot confirm a detail, we say Unknown — call to confirm rather than guess. We distinguish a spring's source-water temperature from the temperature of the pool you actually soak in.

Map coordinates come from OpenStreetMap and are approximate. For primitive springs, a pin is never a trail route.

NOAA's historical Thermal Springs List was decommissioned in May 2025. We do not use it as evidence of current access, pricing or operating status.

What we are not

We do not own, operate or manage any spring we list, and we are not affiliated with them. We do not publish user reviews, ratings or rankings.

Read our Colorado directory or send a correction.