Hot Sulphur (Miracle Hot) Springs
Known locally as Miracle Hot Springs, this Twin Falls County source flows at 131 degrees Fahrenheit near Buhl in the Snake River Canyon region. Its alkaline chemistry registers a pH of 9.4 with virtually no magnesium and elevated sodium at 130 mg/L, giving the water a distinctly soft, slippery feel.
The spring sits at 2,900 feet in one of Idaho's warmest and driest corridors. Annual precipitation barely tops 10 inches, and snowfall averages just 14 inches. The surrounding canyon landscape is carved basalt and dry grassland, shaped by the ancient Bonneville Flood. In summer, ambient temperatures push well above the 54.7-degree annual average, narrowing the gap between air and water. In winter, steam pours off the 131-degree source in thick plumes.
The name "Hot Sulphur" references sulfate concentrations of 34 mg/L, noticeable by faint mineral odor near the source. The spring's sodium-dominated chemistry with zero detectable magnesium indicates deep circulation through volcanic rock, likely the rhyolite and basalt formations underlying the Snake River Plain. Commercial development as Miracle Hot Springs brought the water into managed soaking pools.
Located a short walk from the road near Buhl, the spring is accessible in the Snake River Canyon area of Twin Falls County. Water emerges well above safe soaking temperature at the source. Check locally for current access conditions and any facility hours if visiting the developed site. The semi-arid climate means sun protection is essential year-round.
Is Hot Sulphur (Miracle Hot) Springs worth visiting?
Best for
- Hot spring soaking
The water at Hot Sulphur (Miracle Hot) Springs is alkaline (pH 9.4).