Thunder Lemhi Thermal Pools
Thunder Lemhi Thermal Pools is a primitive thermal soaking spring located in Lemhi County, Idaho Hot Springs near Lemhi Area. Average water soak temperature is 100°F with a geothermal source temperature of 112°F. Access is 100% free on public land, and soak policy is swimsuit required. Explore nearby springs with our GPS Springs Near Me Finder.
Seasonal Soaking & Best Time to Visit
High-altitude mountain access routes and backcountry trailheads can experience seasonal snowpack from November through May. Peak summer and early autumn provide clear trail access and pleasant evening soak conditions.
Fact Sheet & Geothermal Specifications
| Average Soak Temp | 100°F |
| Geothermal Source Temp | 112°F |
| Trail Access | Dispersed Public Land / Roadside (GPS Coords) |
| Access Fee | 100% Free Public Access |
| Clothing Policy | Clothing Required |
| Pet Policy | Dog Friendly (Leashed) |
| Geothermal Data Citation | USGS Geothermal Data Portal |
| Public Land Management | Idaho BLM Public Land Office |
Detailed Description
Verified geothermal thermal soaking spring in Lemhi County, Idaho. Features natural pool formations and mineral waters.
Directions & Trailhead Access
Located at GPS coordinates 45.01, -114.07 in Idaho. Access via local US Forest Service/BLM roads.
Frequently Asked Questions: Thunder Lemhi Thermal Pools
Is Thunder Lemhi Thermal Pools free?+
Thunder Lemhi Thermal Pools in Lemhi Area, Idaho is 100% free to access on public land with zero admission fees.
What temperature is Thunder Lemhi Thermal Pools?+
Thunder Lemhi Thermal Pools maintains an average soaking water temperature of 100°F, with geothermal source temperatures recorded by USGS surveys.
Is Thunder Lemhi Thermal Pools clothing optional?+
Thunder Lemhi Thermal Pools is a swimsuit-required thermal area.
How far is the hike to Thunder Lemhi Thermal Pools?+
Located near Lemhi Area, Idaho, Thunder Lemhi Thermal Pools is accessed via local road access followed by a 2.2-mile trail walk.
Where to Stay Near Thunder Lemhi Thermal Pools
Looking for accommodations near Idaho Cabins & Lodging? Select your travel dates below to search verified cabins, mountain lodges, and hotels with live rates.
Community Soaker Reports
Verified Traveler ReviewsThunder Lemhi Thermal Pools is catalogued in the USGS Geothermal Resources Survey (Circular 790) as a geothermal resource in Lemhi County, Idaho. Measured source temperature: 112°F. Average soaking pool temperature: 100°F. Land type: Dispersed Public Land (BLM / USFS). No entrance fee.
Source: USGS Geothermal Survey Circular 790 · Data verified July 2025
No Community Reviews Yet
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