Natural hot spring · Colorado
Radium Hot Springs
Grand County, Colorado · 11 miles southwest of Kremmling, CO
Last updated
- Type
- Natural Natural hot spring
- Water temperature
- 102°F (39°C) at the source
- Cost
- Not recorded
- Hours or season
- Not recorded
- Clothing
- Not recorded
- Nearest town
- Kremmling, CO (11 mi / 17 km)
- Coordinates
- Pools or sources
- 1
About Radium Hot Springs
Radium Hot Springs is a natural hot spring in Grand County, Colorado, about 11 miles southwest of Kremmling, CO. The nearest large city is Boulder, CO, roughly 67 miles away as the crow flies.
The temperature at the source has been recorded at 102°F (39°C). That puts it in the "classic hot-tub range" range. The range most soakers aim for. 104°F is the upper limit the US Consumer Product Safety Commission recommends for hot tubs.
It is a natural spring with little or no development. Some natural springs have rock pools you can sit in, while others are too hot, too shallow or on land where soaking is not allowed.
Water temperature
Classic hot-tub range. The range most soakers aim for. 104°F is the upper limit the US Consumer Product Safety Commission recommends for hot tubs.
Readings come from OpenStreetMap mappers, USGS water quality samples, and other public sources. Temperatures change with season, flow and pool design. See our soak temperature guide for safe soaking times.
Map and directions
Red marks Radium Hot Springs. Other colored dots are nearby springs in this directory. Coordinates: 39.95984, -106.54065.
Getting there
- Nearest town: Kremmling, CO. The spring is about 11 miles (17 km) southwest of town in a straight line.
- Nearest large city: Boulder, CO, about 67 miles (108 km) in a straight line.
- Planning from a city? See hot springs near Denver, CO.
- Use the directions buttons above for a driving route. Final roads to many springs are unpaved, seasonal or closed in winter, so check road conditions before you go.
Weather forecast
Live forecast for this exact spot from the US National Weather Service.
Hot springs near Radium Hot Springs
- Hot Sulphur Springs Not recorded
- Dotsero Warm Springs 90°F
- Steamboat Springs 102°F
- Strawberry Park Hot Springs 147°F
- Glenwood Hot Springs Grand Pool 90°F
- Iron Mountain Hot Springs Not recorded
Before you go
- Check the operator, land manager or park website for current hours, fees and closures. Details in any directory can go out of date.
- Pack out everything you bring, including food scraps. Do not use soap in natural pools.
- Keep your head above water. Warm fresh water can carry Naegleria fowleri, a rare but deadly amoeba that enters through the nose.
- Drink water, limit soaks to 10 to 20 minutes at a time in very hot water, and skip alcohol.
- Read our hot spring etiquette guide and safety guide.
Frequently asked questions
How hot is Radium Hot Springs?
The temperature at the source has been recorded at 102°F (39°C), which is classic hot-tub range. The range most soakers aim for. 104°F is the upper limit the US Consumer Product Safety Commission recommends for hot tubs.
Where is Radium Hot Springs?
Radium Hot Springs is in Grand County, Colorado, about 11 miles southwest of Kremmling, CO. The GPS coordinates are 39.9598, -106.5406.
Can you soak at Radium Hot Springs?
Natural springs vary. Some have pools built by visitors, others are too hot or shallow, and some are on private land or in areas where bathing is banned. Check local rules and test the water before you get in.
What hot springs are near Radium Hot Springs?
The closest listed spring is Hot Sulphur Springs, about 24 miles east. Dotsero Warm Springs is about 38 miles away.
What should I bring to a hot spring?
Water to drink, a towel, sandals with grip, a bag to pack out trash, and warm layers for after your soak. At primitive springs bring a headlamp and tell someone where you are going.
Sources and corrections
This listing combines OpenStreetMap, the USGS/EPA Water Quality Portal. Data last refreshed August 2026. Source 1 Source 2
Visited recently? Send a correction, such as a temperature reading, fee, closure or photo. If you look after this spring and want it removed, see removal requests.