About Bonneville Hot Springs
A hot creek with impressive water volume cascades down a forested hillside into a series of pools before reaching the South Fork of the Payette River. Multiple sources on the hillside feed the creek, coating rocks in white, orange, and green mineral deposits. The upper sources are dangerously hot, often exceeding 140°F. Lower pools where hot and cold water blend sit at a more comfortable 100-110°F.
Directions to Bonneville Hot Springs
44.157, -115.314
From Boise, take Highway 21 north about 65 miles through Idaho City to Lowman. Continue northeast on Highway 21 toward Stanley for 8 miles. Pullout is on the right (south) side. Follow the trail along the hot creek about 0.25 miles upstream to the main pools. About 2 hours from Boise; no high clearance needed. From Stanley, drive southwest on Highway 21 for 35 miles.
Best Time to Visit
June through October for warm weather and reliable road access. Weekdays are quieter than summer weekends. Winter access depends on Highway 21 snow conditions.
Tips
- ✓Keep children and pets away from the upper sources. Water exceeds 140°F.
- ✓Wear water shoes; mineral deposits on rocks are very slippery.
- ✓Arrive early on summer weekends; the small parking lot fills fast.
- ✓Bonneville Campground nearby has fire rings and vault toilets for overnight stays.
- ✓Test pool temps before entering, especially in upper pools near the source.
- ✓Bring sun protection. Some pools have limited shade at midday.
- ✓Pack out all trash to keep this free site accessible for everyone.
