Bonneville Hot Springs Soakable
Bonneville Hot Springs reads 185°F at the source (NCEI, historical reading); the pools people soak in usually run cooler than the source. Managed by the Boise National Forest (checked 2026-08-19).
185°F / 85°C
Boiling-class range at the source — scalds in seconds
Reading from the NCEI Thermal Springs List (historical reading, 1981 compilation). Source temperature — lower pools usually run cooler.
Water temperatures change with flow and season — test before entering, and never submerge your head in warm natural water. CDC guidance on Naegleria fowleri.
- Coordinates 44.157° N, 115.314° W · USGS National Map
- Land manager Boise National Forest — checked 2026-08-19
- Getting there Short walk from parking
- Season Campground open end of May through end of September.
Access
A quarter-mile hiking trail leads from Bonneville Campground, off Highway 21 east of Lowman, to the Bonneville Hot Springs soaking pool. Day use is $5 per vehicle and single campsites are $15. After September 30 the campground closes but dispersed use continues, without services, until snow arrives.
Trailhead: Bonneville Campground, Highway 21
Winter: Dispersed camping continues after September 30 — with no water, trash or toilet services — until the snow flies; the campground gate is closed during the winter season.
Access notes read from the manager's own page, checked 2026-08-19.
Check current conditions with the Boise National Forest
Nearby springs
-
Kirkham Hot Springs
13 miles away · Idaho · 149°F at the source
Soakable
-
Pine Flats Hot Springs
20 miles away · Idaho · 138°F at the source
Soakable
-
Hot Springs Campground
30 miles away · Idaho · 124°F at the source
Soakable
Identity, coordinates, and temperature quoted from the NCEI Thermal Springs List (historical reading, 1981 compilation).