Alkali Flats Warm Spring
Alkali Flats Warm Spring emerges at 93°F within the Fort Hall Reservation, maintaining water 49 degrees above ambient in a high-elevation sagebrush environment. The 5,675-foot elevation and tribal management preserve this geothermal feature on Shoshone-Bannock lands.
The spring flows into the Snake River Plain's sagebrush steppe landscape where scattered geothermal features emerge from the high-desert floor. Water emerges warm enough to create visible steam in cold air, surrounded by sparse vegetation adapted to semi-arid conditions.
Public access status remains unknown on tribal lands, requiring visitor coordination with Fort Hall Reservation authorities. The spring lies 0.9 miles from the road via short walk. Nearby Morgans Bridge Campground 4.2 miles distant offers base support for exploration.
Alkali Flats sits on the Snake River Plain, where tectonics and groundwater circulation create conditions for thermal springs at numerous locations. The spring's chemistry reflects mineral-rich water emerging from significant depths in the plain's aquifer system.
The water at Alkali Flats Warm Spring is slightly acidic (pH 6.6). It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and sulfate (traditionally used for skin conditions and inflammation).
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This BLM managed site located along the Blackfoot River that has opportunities for fishing, camping, and non-motorized boating. Campground rules and regulations are posted at the site. There are no dumpsters on site, visitors must pack in and out their trash. Campsites: 12 developed sites--- 10 which are accessible by vehicle and 2 which are walk-in only. At this time, there is not a reservation system in place for the campsites. Campsites are on a first come first serve basis. This site is e...
Alkali Flats Warm Spring sits at 5,675 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 23% stronger than at sea level, so bring sunscreen and drink more water than you normally would.
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Alkali Flats Warm Spring is road-accessible, so you can bring more gear. Cold air temperatures make a changing robe or warm layers essential.
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