Natural hot spring · Idaho
Running Warm Springs
Idaho County, Idaho · 46 miles southwest of Hamilton, MT
Last updated
- Type
- Natural Natural hot spring
- Water temperature
- 106°F (41°C) at the source
- Cost
- Not recorded
- Hours or season
- Not recorded
- Clothing
- Not recorded
- Nearest town
- Hamilton, MT (46 mi / 74 km)
- Coordinates
- Pools or sources
- 1
- Historical record only: this spring has not been confirmed on the ground since 1981 and may be on private land.
About Running Warm Springs
Running Warm Springs is a natural hot spring in Idaho County, Idaho, about 46 miles southwest of Hamilton, MT. The nearest large city is Missoula, MT, roughly 84 miles away as the crow flies.
The temperature at the source has been recorded at 106°F (41°C). That puts it in the "very hot" range. Hotter than a hot tub. Enter slowly, keep soaks short and get out if you feel dizzy.
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.
This spring comes from the US federal Thermal Springs List compiled in 1981. Nobody has confirmed it on the ground for this directory since, so treat the details as historical. Many springs on that list sit on private ranch land, so never visit without permission.
Water temperature
Very hot. Hotter than a hot tub. Enter slowly, keep soaks short and get out if you feel dizzy.
Readings come from the NOAA thermal springs list, 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 Running Warm Springs. Other colored dots are nearby springs in this directory. Coordinates: 45.85200, -114.93700.
Getting there
- Nearest town: Hamilton, MT. The spring is about 46 miles (74 km) southwest of town in a straight line.
- Nearest large city: Missoula, MT, about 84 miles (135 km) in a straight line.
- Planning from a city? See hot springs near Missoula, MT.
- 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 Running Warm Springs
- Martin Hot Springs Not recorded
- Red River Hot Springs 131°F
- Stuart Hot Springs Not recorded
- Barth Hot Springs 140°F
- Blue Joint Hot Springs Not recorded
- Horse Creek Hot Springs 109°F
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 Running Warm Springs?
The temperature at the source has been recorded at 106°F (41°C), which is very hot. Hotter than a hot tub. Enter slowly, keep soaks short and get out if you feel dizzy.
Where is Running Warm Springs?
Running Warm Springs is in Idaho County, Idaho, about 46 miles southwest of Hamilton, MT. The GPS coordinates are 45.8520, -114.9370.
Can you soak at Running Warm 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 Running Warm Springs?
The closest listed spring is Martin Hot Springs, about 11 miles north. Red River Hot Springs is about 13 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 the NOAA NCEI Thermal Springs List. Data last refreshed August 2026. Source 1
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.