Frenchman's Bend Hot Springs

Frenchman's Bend Hot Springs is a scenic soaking spot along both banks of Warm Springs Creek
Hot geothermal mineral water flows into volunteer-built rock-walled pools

Frenchman's Bend Hot Springs is a soaking destination along Warm Springs Creek, 11 miles southwest of Ketchum. Tucked away in the Sawtooth National Forest, the hot springs offers a unique contact with beautiful Idaho nature while relaxing in the open air geothermal bath.

Managed by US Forest Service, this is simple, yet picturesque location consisting of several rock-walled pools separating the soaking area from the colder water of the creek.

The hot mineral water flows out of the source at 138°F right into a few pools with sandy bottoms on both banks of the creek. Water temperature highly depends on the season and the river levels. During spring runoffs, soaking pools are submerged with the creek water completely.

You will have to drive for about 7 miles on a dirt road to get to the spring, but it is passable by any passenger vehicle. Please, keep in mind that parking is limited and can get full during weekends and holidays. This hot spring location is popular among both visitors and locals.

Clothing is required at the hot springs. This is a day-use-only location (open from 4 AM to 10 PM), with no camping or overnight stay allowed. Open all year long with no fees. No services at this location, the closest services are 11 miles away at the small city of Ketchum.

The spring is not pet-friendly and glass containers near the soaking pools are prohibited. Please, pack all your trash and leave no trace behind!

Frenchman's Bend Hot Springs

Frenchman's Bend Hot Springs

Frenchman's Bend Hot Springs

Frenchman's Bend Hot Springs

Frenchman's Bend (Warfield) Hot Springs | Facts

Location: 11 miles west of Ketchum • Idaho • USA
Open: 365 days a year
Development: Primitive
Clothing: Required
Amenities: None
Accommodations: None
Hiking distance: Short
Road access: Any vehicle
Day-use fees: None

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

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

Average dissolved solids: 266 Mg/L


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


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

More Adventures

Directions to Frenchman's Bend (Warfield) Hot Springs

From Ketchum,

  • Travel 10.7 miles west on Warm Springs Road to the destination.

GPS: N 43°38.475' W 114°29.385' | 43.641256, -114.489747

"Geothermal Resource Analysis in the Big Wood River Valley, Blaine County, Idaho". 1990. Idaho Department of Water Resources.

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