Radium Hot Springs
Radium Hot Springs is a primitive thermal soaking spring located in Grand County, Colorado Hot Springs near Kremmling. Average water soak temperature is 97°F with a geothermal source temperature of 98°F. Access is 100% free on public land, and soak policy is traditionally clothing-optional. 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 | 97°F |
| Geothermal Source Temp | 98°F |
| Hiking Distance | 0.75 miles (moderate) |
| Access Fee | 100% Free Public Access |
| Clothing Policy | Clothing Optional |
| Pet Policy | Dog Friendly (Leashed) |
| Geothermal Data Citation | USGS Geothermal Data Portal |
| Public Land Management | Colorado BLM Public Land Office |
Detailed Description
Natural thermal pool built into the rocky bank of the Colorado River. Popular cliff jumping and river soaking spot.
Directions & Trailhead Access
From Kremmling, take County Road 11 south to Mugrage Campground trailhead, hike down to the river pool.
Frequently Asked Questions: Radium Hot Springs
Is Radium Hot Springs free?+
Radium Hot Springs in Kremmling, Colorado is 100% free to access on public land with zero admission fees.
What temperature is Radium Hot Springs?+
Radium Hot Springs maintains an average soaking water temperature of 97°F, with geothermal source temperatures recorded by USGS surveys.
Is Radium Hot Springs clothing optional?+
Radium Hot Springs is traditionally clothing-optional for thermal soaking.
How far is the hike to Radium Hot Springs?+
Located near Kremmling, Colorado, Radium Hot Springs is accessed via local road access followed by a 0.75-mile trail walk.
Where to Stay Near Radium Hot Springs
Looking for accommodations near Kremmling / Silverthorne, CO? Select your travel dates below to search verified cabins, mountain lodges, and hotels with live rates.
Hotel Kremmling & Alpine Suites
Cliffside Colorado River Cabins
Community Soaker Reports
Verified Traveler ReviewsRadium Hot Springs is catalogued in the USGS Geothermal Resources Survey (Circular 790) as a geothermal resource in Grand County, Colorado. Measured source temperature: 98°F. Average soaking pool temperature: 97°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
Have you soaked at Radium Hot Springs? Share your water temperature measurements, pool conditions, and road access tips to help fellow travelers!