Potosi Hot Springs (Public)

## Overview Potosi Hot Springs is a free, publicly accessible natural hot spring located near Harrison, Montana, in the scenic foothills of the Tobacco Root Mountains. Situated at approximately 45.576°N, 111.908°W, this geothermal spring sits in a region rich with mining history — the name "Potosi" itself harkens back to the famous silver mining legacy of the area, with the nearby Potosi mining district having been active since the late 1800s. The broader region around Harrison and Pony, Montana, is well known for its geothermal activity, with several hot springs dotting the landscape along fault lines in the ancient metamorphic and granitic bedrock. Potosi Hot Springs has historically been enjoyed by locals and visitors alike as a place to soak and relax in naturally heated mineral water. The spring is located in a rural, relatively remote setting in Madison County, offering a quieter alternative to more commercialized Montana hot springs. As with all natural hot springs, water temperatures can vary seasonally, and the mineral content reflects the deep geothermal circulation through the region's volcanic and metamorphic geology. ## Directions 1. From Harrison, Montana, head south on MT-283 (also known as the Pony Road / Harrison-Pony Road). 2. Continue toward the small community of Pony, watching for signs or local references to Potosi Hot Springs. 3. The springs are located in a rural area southwest of Harrison. GPS coordinates (45.575955, -111.908223) are recommended for navigation, as signage may be limited. 4. A high-clearance vehicle may be helpful depending on road conditions, particularly during spring snowmelt or after heavy rain. 5. Cell service in this area can be unreliable — download offline maps before your trip. ## What to Expect Potosi Hot Springs offers a rustic, undeveloped soaking experience in the Montana backcountry. The setting is rural and peaceful, surrounded by the rolling hills and mountain terrain characteristic of the Tobacco Root range. Visitors should expect a natural, minimally improved site — this is not a resort or developed facility. The water is geothermally heated, and temperatures can vary depending on the season and recent weather conditions. As with many natural hot springs in Montana, the water may contain dissolved minerals typical of geothermal sources in this region. Water from natural hot springs has not been independently verified for safety, so visitors should exercise their own caution regarding contact and consumption. Because this is a free public site, there are typically no amenities such as restrooms, changing areas, or trash receptacles. Visitors are encouraged to pack out everything they bring in and to leave the area as they found it. The springs can be visited year-round, though winter access may be more challenging due to snow-covered roads. Summer and early fall tend to offer the most comfortable access conditions. The remote location and lack of crowds make Potosi Hot Springs a rewarding destination for those seeking an authentic, off-the-beaten-path Montana hot spring experience.