About Sacajawea Hot Springs
Sacajawea Hot Springs sits along Warm Springs Creek in the Sawtooth Wilderness, about 2.5 miles up the trail from Grandjean Trailhead. Multiple geothermal sources feed into the creek, creating a spread-out chain of pools at different temperatures. The upper source runs very hot (145F), but most soaking pools settle into the 100-115F range where creek water mixes in.
Directions to Sacajawea Hot Springs
44.1603, -115.1781
From Boise, drive north on Highway 21 about 80 miles to the Grandjean turnoff. Turn right onto Forest Road 524 and follow it 6 miles to Grandjean Trailhead. The road is unpaved and rough; high-clearance recommended. From the trailhead, take Warm Springs Creek Trail (Trail 098) 2.5 miles to the springs. Moderate elevation gain with one or two creek crossings that can be tricky during high water. Watch for the springs on the left side of the creek.
Best Time to Visit
Mid-July through September for dry trails and manageable creek crossings. The access road and trail are typically snowed in from late October through June.
Tips
- ✓Start early to claim the best pools and avoid afternoon thunderstorms.
- ✓Sturdy hiking boots recommended; the trail has rocky sections and creek crossings.
- ✓Trekking poles help with creek crossings, especially during spring runoff.
- ✓Carry bear spray and use bear-resistant food storage if camping.
- ✓Check road conditions for Forest Road 524 before your trip.
- ✓Bring dry bags for electronics at creek crossings.
- ✓Pack out everything including fruit peels and food scraps.
