Mile 15 Hot Spring
Frank Church Wilderness, Idaho, United States
- Location
- Frank Church Wilderness, Idaho, United States
- Water type
- iron-rich
- Temperature
- 38 °C
- pH
- 6.3
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
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Mile 15 Hot Spring is located in the Frank Church Wilderness, a vast protected wild area of central Idaho. Iron-rich water surfaces here at around 38°C in an open-air pool, popular with wild-bathing enthusiasts.
Insider tip — The Middle Fork Salmon River in the Frank Church Wilderness is one of America's premier wilderness river experiences — a 100-mile Class IV-V white-water journey through a canyon deeper in places than the Grand Canyon, surrounded by the largest roadless area in the continental United States. Mile 15 Hot Spring provides iron-rich thermal bathing at the edge of this extraordinary river corridor, where geothermal springs emerge from the Idaho Batholith granite at one of the most remote thermal sites in North America.
Nearby
Frequently asked questions
How hot is the water?
The water is neutral here, around 38 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features iron-rich water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.