Running Warm Springs flows at 106 degrees in the Nezperce National Forest at 4,140 feet, carrying some of the most alkaline water in Idaho with a pH of 9.7. Its extremely low mineral content, just 1.6 mg/L calcium and 0.03 mg/L magnesium, produces remarkably soft thermal water.
The walk from Running Creek Road covers roughly half a mile through dense national forest in an area that receives nearly 36 inches of precipitation and over 12 feet of snow each year. The spring emerges in a drainage surrounded by conifers, where the sound of Running Creek mixes with birdsong and wind through the canopy. The water feels silky against skin due to its exceptional softness, and the forest canopy provides shade over much of the approach.
History of Running Warm Springs
Located in what records list as Ravalli County but functionally within the Nezperce National Forest, this spring sits along a deep fault zone that allows meteoric water to circulate far underground before returning heated and stripped of nearly all dissolved minerals. The 9.7 pH and trace magnesium suggest prolonged contact with granitic rock at depth. Paradise Campground, 15 miles away on the Selway River, serves as the nearest developed facility.
Reaching the spring requires a half-mile walk from Running Creek Road. The temperature is comfortable for soaking without dilution. Snow closes access roads from roughly November through May, so summer and early fall are the reliable window. Paradise Campground on the Selway River, about 15 miles away, is first-come-first-served with 11 sites. Bring everything you need; this is remote country.
Is Running Warm Springs worth visiting?
Best for
- Hot spring soaking
- Overnight camping trips
Running Warm Springs is well suited for hot spring soaking and overnight camping trips.
Annual Precip: 35.7 in
Annual Snow: 147.7 in
December
Air 24°F · Water 106°F · +82° contrast
January
Air 27°F · Water 106°F · +79° contrast
February
Air 29°F · Water 106°F · +77° contrast
December offers 45°F more contrast than August
Recent Temperature
109.4°F
(43.0°C)
Measured Jul 13, 1982
The water at Running Warm Springs is alkaline (pH 9.7).
pH influences mineral absorption through skin
May support bone density and joint health
Known for muscle relaxation and stress relief
Supports circulation and skin hydration
Traditionally used for skin conditions and inflammation
Natural antiseptic with skin health benefits
Paradise Campground is located near the Paradise Boating Site which is one of the most popular launching sites on the Selway River. The campground consists of 11 sites complete with picnic tables, and fire rings. Other facilities include 3 vault toilets, hitching rails, and feed bunks. Campground can accommodate RV's or trailers to 25 feet.
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Warm layers
Cold air before and after soaking
Camping gear
Nearby camping at Paradise Campground
Trash bag
Pack out what you pack in
24 miles from Hamilton, ID
USGS Quad: THREE PRONG MTN. 7.5 · PP 492: 9.0 · NOAA: 1.0 · AMS Map: ELK CITY
What is the water temperature at Running Warm Springs?
Running Warm Springs has a water temperature of 106°F (41°C). This is considered a hot spring, well above body temperature.
Where is Running Warm Springs located?
Running Warm Springs is located in Ravalli County, Idaho at 4,140 feet elevation, near Hamilton. Coordinates: 45.8520°N, 114.9370°W.
How do I get to Running Warm Springs?
Running Warm Springs has Short Walk road access, with the nearest road being Running Creek Road (0.6 mi from the road).
Is Running Warm Springs free to visit?
Running Warm Springs has Open access. It is managed by US Forest Service.
Can I camp near Running Warm Springs?
Yes, Paradise Campground is located nearby (9.6 miles away).
What minerals are in the water at Running Warm Springs?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 9.7 (alkaline).
Is it safe to soak at Running Warm Springs?
Running Warm Springs is generally safe for soaking at its recorded temperature. Always tell someone your plans before visiting remote hot springs.
Is Running Warm Springs crowded?
Running Warm Springs sees varying levels of visitors depending on the season and day of the week.
What should I bring to Running Warm Springs?
Essentials for Running Warm Springs: swimsuit, towel, water bottle, warm layers for before and after soaking, camping gear, a trash bag to pack out what you pack in.