Sleeping Buffalo Hot Springs

Sleeping Buffalo Hot Springs takes its striking name from a legendary boulder on the Montana prairie, a glacial erratic long venerated by the Assiniboine people and said to resemble a resting bison. Located in northeastern Montana's Hi-Line country, this resort-style facility channels a distinctive blend of sodium-chloride and bicarbonate water from one of the state's most culturally resonant geothermal sites.

The spring flows at 35 °C with a noticeably alkaline pH of 7.8, reflecting the mineral-rich character of water drawn from deep sedimentary formations beneath the Great Plains. The dual sodium-chloride and bicarbonate composition produces a water that is both softening and subtly complex — a gentle salinity combined with a mild silkiness that distinguishes it from simpler single-mineral springs. The vast prairie sky and the weight of the site's Indigenous cultural history give a soak at Sleeping Buffalo a dimension that extends well beyond the warmth of the water.