Big Hole Hot Springs
Illustration photo — not a verified picture of this exact spot.
- Location
- Montana, United States
- Water type
- sodium chloride
- Temperature
- 35 °C
- pH
- 7.5
Water profile
Soothing — neither hot nor cold, perfect balance.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Montana's Big Hole Valley is one of the American West's most spectacular high-elevation basins, framed by the Pioneer, Anaconda, and Beaverhead ranges and crossed by the Big Hole River, legendary among fly-fishers. In this setting of ranching history and breathtaking mountain vistas, Big Hole Hot Springs offers a thermal resort experience shaped by the grandeur of the surrounding landscape.
The geothermal water surfaces at 35 °C with a sodium-chloride mineral composition, giving it a pleasant briny warmth that distinguishes it from the purely freshwater character of many Rocky Mountain springs. The slightly alkaline pH of 7.5 produces a smooth, comfortable soak well-suited to extended visits. The resort provides developed facilities while preserving the essential appeal of soaking in geothermal water beneath Montana's immense open skies — an experience that feels quintessentially Western, unhurried, and deeply tied to the physical landscape of the northern Rockies.