Medicine Hot Springs

Ravalli County, Montana · Near Hamilton
45.8410°N, 114.0380°W · 4,884 ft
117°F 32°F air · Good soaking weather 4,884 ft Open Short Walk US Forest Service Camping nearby (0.1 mi)

Hot water surfaces at Medicine Hot Springs in the Bitterroot National Forest, Ravalli County, Montana, about twenty-nine miles from Hamilton. It comes out above the range most people soak in directly, and a 1976 sample showed alkaline water with iron present. Access is open, the land is Forest Service, and a campground sits practically beside it, so the practical pieces are in place.

Location

Mid elevation in the Bitterroot country, with heavy snow, close to a hundred inches a year, and a wet climate. The nearest road is a tenth-mile off and unnamed on the record. Warm Springs Campground is essentially on top of it. National forest, no fee listed.

Put a hand in before a foot; it runs hot. Warm Springs Campground is right there, which settles where to stay. The record flags December through February as best, but this much snow makes summer the easier bet. Access is open. Chemistry dates to 1976.

Terrain

Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Medicine Hot Springs.

Aerial view of the ground around Medicine Hot Springs LiDAR bare-earth view of the same ground around Medicine Hot Springs
Aerial LiDAR bare earth

Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.

Setting
Canyon floor
Steep ground climbs away on both sides of the spring.
Highest ground nearby
573 ft above the spring
Within a quarter mile, to the southeast
Cross-section through the spring

A slice through the ground from southwest to northeast, about 0.6 miles end to end.

Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.

Heat Below
90 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 31% of the springs on this site.

Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.

Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.

Monthly Climate
22°
Jan
25°
Feb
32°
Mar
38°
Apr
48°
May
58°
Jun
68°
Jul
67°
Aug
57°
Sep
42°
Oct
28°
Nov
20°
Dec
Annual Precip: 25.0 in Annual Snow: 96.5 in
Best Time to Visit
December Air 20°F · Water 117°F · +97° contrast
January Air 22°F · Water 117°F · +95° contrast
February Air 25°F · Water 117°F · +92° contrast
December offers 48°F more contrast than July
Current Conditions
32°F
E 0.0 mph 98% Good soaking weather
Today 70° Low 36° Sunny
Spring is +47° warmer
Wednesday 72° Low 40° Sunny
Spring is +45° warmer
Thursday 75° Low 43° Mostly Sunny then Showers And Thunderstorms Likely 60% precip
Spring is +42° warmer
Friday 67° Low 40° Showers And Thunderstorms Likely 62% precip
Spring is +50° warmer
Saturday 72° Low 40° Sunny 8% precip
Spring is +45° warmer
Water Chemistry Sampled 1976-07-23

The water at Medicine Hot Springs is alkaline (pH 8.6).

pH 8.6 Alkaline
pH influences mineral absorption through skin
Calcium 2 mg/L
May support bone density and joint health
Magnesium 0 mg/L
Known for muscle relaxation and stress relief
Sodium 80 mg/L
Supports circulation and skin hydration
Sulfate 36 mg/L
Traditionally used for skin conditions and inflammation
Chloride 8 mg/L
Natural antiseptic with skin health benefits
Iron 20 µg/L
Iron-rich springs may support circulation
Where to Stay

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Nearby Camping
Warm Springs Campground 0.1 mi away

Warm Springs Campground is nestled in a wooded area along Crazy Creek. It hosts 14 sites with picnic tables, fire rings, and vault toilets. There is no garbage service so Pack it in/Pack it out. Campground can accommodate trailers under 26 feet.

Reserve on Recreation.gov →
Temperature
117°F
Warm Hot Boiling
Water Temp 117°F (47°C)
Avg Air Temp 42°F
Above Ambient +75°F
Great soaking conditions September
Access
Open
Road Access Short Walk
Distance to Road 0.1 mi
Land
Ownership Federal
Agency US Forest Service
Designation National Forest
Unit Bitterroot National Forest
Manager US Forest Service
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at Medicine Hot Springs?
Medicine Hot Springs has a water temperature of 117°F (47°C). This is considered a hot spring, well above body temperature.
Where is Medicine Hot Springs located?
Medicine Hot Springs is located in Ravalli County, Montana at 4,884 feet elevation, near Hamilton. Coordinates: 45.8410°N, 114.0380°W.
How do I get to Medicine Hot Springs?
Medicine Hot Springs has Short Walk road access (0.1 mi from the road).
Is Medicine Hot Springs free to visit?
Medicine Hot Springs has Open access. It is managed by US Forest Service.
Can I camp near Medicine Hot Springs?
Yes, Warm Springs Campground is located nearby (0.1 miles away).
What minerals are in the water at Medicine Hot Springs?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 8.6 (alkaline).
Is it safe to soak at Medicine Hot Springs?
With care. At 117°F Medicine Hot Springs is hot enough to need short sessions, fifteen to twenty minutes, and plenty of water. Enter slowly and get out if you feel light-headed.
Sources: USGS NWIS