Circle Hot Springs
Circle Hot Springs emerges at 135°F from boreal forest, positioned just 75 feet from the Steese Highway near Fairbanks. The 108-degree temperature differential above the region's frigid 27°F average air temperature makes this one of Alaska's most dramatic thermal contrasts in a continental climate.
Standing at 900 feet elevation, the hot spring creates steaming pools amid spruce and birch forest in Interior Alaska's extreme cold climate. The spring's outlet is accessible from a short approach, and the clear thermal water offers a stark sensory experience against subzero winter temperatures and the midnight sun of summer.
Circle Hot Springs formed along the Steese Highway northeast of Fairbanks in mineral-rich boreal terrain. The spring measures 135°F with sodium chloride dominance (250 mg/L sodium, 240 mg/L chloride) and a neutral pH of 7.2, characteristic of deep geothermal sources in Alaska's interior.
Access is straightforward by vehicle via the Steese Highway. Visit during late spring through early fall for optimal conditions. Average annual temperatures of 27°F mean extreme cold in winter, with 30 inches of annual snow. The spring is roadside accessible year-round.
Is Circle Hot Springs worth visiting?
Best for
- Hot spring soaking
- Easy day trips
- Winter soaking with dramatic temperature contrast
The water at Circle Hot Springs is neutral (pH 7.2) with 809 mg/L total dissolved solids. It is notably rich in chloride (natural antiseptic with skin health benefits).