Frenchman's Bend Hot Springs is a soaking destination located along Warm Springs Creek, about 11 miles southwest of Ketchum, Idaho. Tucked away from the prying eyes in the Sawtooth National Forest, the spot offers a peaceful connection to the region's natural beauty, along with the unparalleled experience of a relaxing open-air geothermal bath.

This picturesque location is managed by the U.S. Forest Service.

You will have to drive approximately 7 miles on a dirt road to get there. The road, however, is passable for most passenger vehicles. Please keep in mind that parking is limited and can fill up quickly on weekends and holidays, as the spot is popular among both locals and visitors.

Frenchman’s Bend is a day-use-only location, open from 4:00 AM to 10:00 PM. Overnight stays are not permitted.

Frenchman's Bend Hot Springs Water and Soaking

The hot springs consist of several rock-walled pools with sandy bottoms, separated from the colder creek water.

Geothermal water emerges on both banks of the creek. On the roadside, it rises directly from the ground at temperatures exceeding 120°F. On the opposite bank, hot water flows from a rocky hillside at temperatures over 138°F.

Soaking pools are located on either side of the creek. If you choose to soak across the creek, be sure to check the water temperature before entering.

Pool temperatures vary by season and creek level. During spring runoff, the soaking pools may be entirely submerged by cold creek water.

At Frenchmen's Bend, clothing is required. Pets are not allowed. Alcohol, glass containers, soap, and shampoo are prohibited. Neither altering existing pools nor constructing new ones is permitted. Please pack out all trash and follow Leave No Trace principles.

Location: 11 miles west of Ketchum • Idaho • USA
Best time: Summer and fall
Development: Wild
Clothing: Required
Amenities: None

Hiking distance: Short
Road access: Any vehicle
Day-use fees: None
Managed by: U.S. Forest Service

Elevation: 6,400 ft (1,950 m)

Water T° (source): 120-138°F (50-59°C)
Water T° (tub): Adjustable
Water acidity level: Alkaline (pH=9.1)
Springs Type: Sodium Silicate
Odor: None

Average dissolved solids: 266 Mg/L

Cations

Sodium (Na)- 68 Mg/L
Calcium (Ca)- 2.1 Mg/L
Potassium (K)- 0.6 Mg/L
Magnesium (Mg)- 0.03 Mg/L

Anions

Silica (SiO2)- 94 Mg/L
Sulfate (SO4)- 38 Mg/L
Chloride (Cl)- 10 Mg/L
Fluoride (F)- 3.1 Mg/L