Rainbow Hot Springs

Archuleta County, Colorado · Near Pagosa Springs
37.5110°N, 106.9450°W · 9,037 ft
104°F 37°F air 9,037 ft Open Hike US Forest Service Camping nearby (5.1 mi)
Aerial view of the ground around Rainbow Hot Springs LiDAR bare-earth view of the same ground around Rainbow 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.

A hike-in soak in San Juan National Forest: that is Rainbow Hot Springs, Archuleta County, roughly seventeen miles from Pagosa Springs. The temperature reading is in the soaking range, a few degrees above body heat. The Forest Service owns the ground and access is open. The Wikipedia page attached is filed under Hot Springs in Mineral County.

Location

The nearest road lies three and a half miles away, and the record classes the approach as a hike. This is high country and the snowfall is huge, twelve feet in an average year, with a wet climate. West Fork Campground, give or take five miles, is the listed camp. Designation: national forest.

The season data ranks winter highest, which at this elevation and snowfall means a serious snow approach. Open access, no fee recorded. Camping at West Fork Campground, five miles off. No chemistry has been logged. The temperature makes it comfortable to sit in once you reach it.

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 Rainbow Hot Springs.

Setting
Hillside
The spring sits on a steep slope that climbs to the north.
Highest ground nearby
550 ft above the spring
Within a quarter mile, to the north
Cross-section through the spring

A slice through the ground from south to north, about 0.6 miles end to end.

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

Heat Below
128 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 78% 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
18°
Jan
20°
Feb
28°
Mar
33°
Apr
40°
May
53°
Jun
58°
Jul
56°
Aug
50°
Sep
39°
Oct
25°
Nov
17°
Dec
Annual Precip: 31.2 in Annual Snow: 144.1 in
Best Time to Visit
December Air 17°F · Water 104°F · +87° contrast
January Air 18°F · Water 104°F · +86° contrast
February Air 20°F · Water 104°F · +84° contrast
December offers 41°F more contrast than July
Current Conditions
37°F
Thunderstorms WSW 37.0 mph 100%
Today 69° Low 48° Slight Chance Rain Showers then Chance Showers And Thunderstorms 45% precip
Spring is +35° warmer
Wednesday 63° Low 48° Showers And Thunderstorms 87% precip
Spring is +41° warmer
Thursday 62° Low 46° Showers And Thunderstorms 96% precip
Spring is +42° warmer
Friday 65° Low 41° Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 72% precip
Spring is +39° warmer
Saturday 66° Low 39° Mostly Sunny then Showers And Thunderstorms Likely 57% precip
Spring is +38° warmer
Nearby Camping
Nearby Camping
West Fork Campground 5.1 mi away

Overview West Fork Campground sits near the West Fork San Juan River in a secluded 10-acre area, just over a mile from Highway 160. Visitors enjoy the area for its hiking opportunities and plentiful solitude.Recreation The West Fork and nearby Wolf Creek offer fishing opportunities, but are heavily fished streams. Only skilled and patient fishermen have much luck in these waters. The West Fork Trail, also known as the Rainbow Trail, leads into the Weminuche Wilderness from a trailhead a mile...

Reservable Yes
Reserve on Recreation.gov →
High Altitude Advisory 9,037 ft

At 9,037 feet, Rainbow Hot Springs is in high-altitude territory where the air is noticeably thinner. Soaking in hot water accelerates dehydration and can amplify altitude effects like headache and fatigue. UV radiation is roughly 36% stronger here. Wear sunscreen even on overcast days and take breaks from the water to rehydrate.

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Temperature
104°F
Warm Hot Boiling
Water Temp 104°F (40°C)
Avg Air Temp 37°F
Above Ambient +68°F
Great soaking conditions September
Access
Open
Road Access Hike
Distance to Road 3.6 mi
Land
Ownership Federal
Agency US Forest Service
Designation National Forest
Unit San Juan National Forest
Manager US Forest Service
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at Rainbow Hot Springs?
Rainbow Hot Springs has a water temperature of 104°F (40°C). This is considered a hot spring, well above body temperature.
Where is Rainbow Hot Springs located?
Rainbow Hot Springs is located in Archuleta County, Colorado at 9,037 feet elevation, near Pagosa Springs. Coordinates: 37.5110°N, 106.9450°W.
How do I get to Rainbow Hot Springs?
Rainbow Hot Springs has Hike road access (3.6 mi from the road).
Is Rainbow Hot Springs free to visit?
Rainbow Hot Springs has Open access. It is managed by US Forest Service.
Can I camp near Rainbow Hot Springs?
Yes, West Fork Campground is located nearby (5.1 miles away).
Sources: USGS NWIS, Wikipedia