Boulder Hot Springs Inn & Spa
Boulder Hot Springs Inn & Spa is a resort thermal spring listed in Jefferson County, Montana Hot Springs near Boulder. Reported soak temperature is 100°F with a historical source temperature of 100°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 100°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 | 100°F |
| Source Temp (Historical) | 100°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 | Montana Land Manager (BLM) |
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
National Register-listed 1910 mission-style inn in Peace Valley at the foot of the Elkhorn Mountains — indoor plunge 104-106°F year-round, 20x60 ft outdoor pool 92-100°F seasonally, plus steam rooms; an alcohol/drug/smoke-free wellness retreat. Fee: $12-14 adult day use. No alcohol/smoking on property; showers mandatory pre-soak.
Directions & Trailhead Access
31 Hot Springs Rd, Boulder — I-15 Boulder exit, 3 mi south on Hwy 69.
Frequently Asked Questions: Boulder Hot Springs Inn & Spa
Is Boulder Hot Springs Inn & Spa free?+
Boulder Hot Springs Inn & Spa is a developed thermal facility near Boulder that requires paid admission.
What temperature is Boulder Hot Springs Inn & Spa?+
Boulder Hot Springs Inn & Spa has a reported soak temperature of 100°F and a historical source temperature of 100°F in survey records. Historical data may not reflect current conditions — always test water before entering.
Is Boulder Hot Springs Inn & Spa clothing optional?+
Boulder Hot Springs Inn & Spa is listed as swimsuit-required in directory records. Confirm current rules before visiting, as policies change.
How do you access Boulder Hot Springs Inn & Spa?+
Boulder Hot Springs Inn & Spa is a recorded location in Jefferson 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 Boulder Hot Springs Inn & Spa
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Community Soaker Reports
Visitor-submitted reports — not independently verifiedNo Community Reviews Yet
Have you soaked at Boulder Hot Springs Inn & Spa? Share your water temperature measurements, pool conditions, and road access tips to help fellow travelers!