Potosi Hot Springs
Potosi Hot Springs is a private thermal spring listed in Madison County, Montana Hot Springs near Pony. Reported soak temperature is 96°F with a historical source temperature of 96°F — actual conditions may differ. Access is subject to admission fees, and clothing policy is listed as swimsuit-required — always confirm before visiting. Explore nearby springs with our GPS Springs Near Me Finder.
Seasonal Soaking & Best Time to Visit
While geothermal pool temperatures remain a constant 96°F year-round, outdoor ambient temperatures fluctuate significantly across Montana. Late spring through autumn offers the most comfortable road access.
Fact Sheet & Geothermal Specifications
| Reported Soak Temp | 96°F |
| Source Temp (Historical) | 96°F |
| Trail Access | Recorded coordinates — access unverified |
| Access Fee | Paid / Resort Fees |
| Clothing Policy | Reported Clothing Required |
| Pet Policy | Reported No Pets |
| Geothermal Data Reference | NOAA Thermal Springs List (1980 archive) |
| Check Land Status | Private land — contact the owner/manager for permission |
Verification & Sources
This record was verified against the following source(s):
Reviewed September 2026 · Treat all details as reported — verify before visiting · How we verify our data
Detailed Description
Secluded 75-acre private retreat on South Willow Creek in the Tobacco Root Mountains ~54 mi west of Bozeman — a 20x50 ft chemical-free mineral pool (~93°F), Finnish sauna and indoor rock soaking tub; four creek-side cabins. Guests only except occasional announced public days. Fee: Cabin guests only; occasional announced public soak days. Cabin guests only; underwent full closure for upgrades in 2024 — confirm availability.
Directions & Trailhead Access
354 Potosi Rd, Pony — from Pony, Potosi Rd ~3 mi then FS Rd 1501 ~3.5 mi.
Frequently Asked Questions: Potosi Hot Springs
Is Potosi Hot Springs free?+
Potosi Hot Springs is a developed thermal facility near Pony that requires paid admission.
What temperature is Potosi Hot Springs?+
Potosi Hot Springs has a reported soak temperature of 96°F and a historical source temperature of 96°F in survey records. Historical data may not reflect current conditions — always test water before entering.
Is Potosi Hot Springs clothing optional?+
Potosi Hot Springs is listed as swimsuit-required in directory records. Confirm current rules before visiting, as policies change.
How do you access Potosi Hot Springs?+
Potosi Hot Springs is a recorded location in Madison County. Exact access, parking, and land status are not verified — check with the local land manager (BLM/USFS/NPS) before visiting.
Where to Stay Near Potosi Hot Springs
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Community Soaker Reports
Visitor-submitted reports — not independently verifiedNo Community Reviews Yet
Have you soaked at Potosi Hot Springs? Share your water temperature measurements, pool conditions, and road access tips to help fellow travelers!