Hot Springs by Experience Type

Wild hot springs are undeveloped natural pools with no gate, no fees, and no facilities — access can require hiking, driving a dirt road, or paddling in. Public pools and parks are developed municipal or state-run sites with set hours, changing rooms, restrooms, and modest entry fees, usually $5–20. Resorts and spas are commercial facilities with soaking pools, lockers, treatments, and often on-site lodging, typically requiring reservations or day passes.

Most wild hot springs on public land are free to visit, but "free" doesn't mean effortless — many require hiking, four-wheel-drive access, or a trailhead parking permit. A small number of natural springs sit on private land and charge a caretaker fee, and a few iconic wild springs (like Three Sisters Springs in Florida) require a paid boardwalk or trolley ticket for wildlife protection.

Not always. Many resorts accept walk-ins for day soaking, but the most popular ones often require booking days or weeks in advance, especially on weekends and holidays. Overnight stays almost always require a reservation. Check the individual listing on Hot Springs Guides for the current policy at any specific resort.

A quick-dry towel, water bottle, sandals for rocky ground, a change of clothes, and a headlamp if you'll be out after dark. Skip glass containers, wear a swimsuit unless the spring is clearly clothing-optional, and never use soap or shampoo in a natural pool — even biodegradable versions harm the ecosystem.

Soaking is generally safe for healthy adults, but a few risks are worth knowing. Naegleria fowleri, a rare but serious brain-infecting amoeba, can live in warm natural water — never submerge your head or let water go up your nose in an untreated wild spring. Avoid soaking alone in a remote location. Pregnant people, young children, and anyone with heart conditions should limit soaks to under 15 minutes at temperatures below 39 °C (102 °F).

Comfortable soaking pools are usually 37–40 °C (98–104 °F), roughly warm-bath temperature. Source temperatures can be much higher — some geothermal springs emerge at 60 °C (140 °F) or more and are only safe to enter after they cool downstream. Every listing on Hot Springs Guides notes the actual pool temperature where it's known.