3 listings
Most Mineral-Rich Hot Springs in Idaho
Springs whose source water tested at 1,500 mg/L or more of dissolved minerals, based on USGS and state lab samples. For comparison, tap water is usually under 500 mg/L.
We list 3 in Idaho: the hottest is Maple Grove Hot Springs (up to 107°F) and the lowest listed adult price is Maple Grove Hot Springs ($18).
Epic Hot Springs
Hot springs pools on North Beach at the north end of Bear Lake, run by Epic Recreation alongside a watercraft rental shop. The operator closes the springs in winter because the geothermal source temperature fluctuates, reopening in spring.
Heise Hot Springs
A family resort on the South Fork Snake River east of Ririe with a hot mineral pool kept around 104°F and a summer swimming pool with a 350-ft water slide. The grounds include cabins, RV campgrounds, a golf course and a pizza parlor. The resort was evacuated during the August 2026 Big Rock Fire and has since reopened.
Maple Grove Hot Springs
A 45-acre off-grid retreat on the Bear River at the north end of Oneida Narrows Reservoir. Six soaking pools, including three circular stone pools and a creek pool, run about 100-107F, fed from source ponds over 160F that are off-limits. Day visitors book 3-hour blocks; the site is alcohol-free, swimwear is required and pools go silent after sundown.