Desert Reef Hot Spring

Fremont County, Colorado · Near Penrose
38.3715°N, 105.0433°W
64°F air · Good soaking weather Roadside Camping nearby (19.6 mi)
Aerial view of the ground around Desert Reef Hot Spring

The orange dot marks the spring, in a frame about three quarters of a mile wide.

Desert Reef Hot Spring is in Fremont County, Colorado, four-odd miles from Penrose. The record has no temperature for it, so the heat of the water is unknown here; do not take the name as proof you can soak. USGS records include a 1975 sample that came back mildly acidic, iron among the minerals. The file is blank on public access and on who owns the land.

Location

County Road 110 lies a couple hundred feet off, so this is a roadside location. No elevation is recorded. Snow comes to a bit more than two feet over a winter, and rain is light; the yearly mean lands in the low fifties. Nobody has entered a land unit or owner.

no season is on record. Roadside. Mingus Ranch, nearly twenty miles away, is the closest campground listed. No fee recorded. Chemistry: 1975. With no temperature and no access status, treat this as a map point to investigate, and check ownership before you go.

Terrain

USGS hasn't flown a detailed laser scan here yet, so this view comes from aerial photos and older elevation data.

Setting
Valley floor
Gentle slopes rise on both sides.
Highest ground nearby
110 ft above the spring
Within a quarter mile, to the southeast
Cross-section through the spring

A slice through the ground from west to east, about 0.6 miles end to end.

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

Heat Below
60 milliwatts per square meter of heat flow

That's close to the US average of 65. It's higher than at 1% 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
30°
Jan
31°
Feb
43°
Mar
50°
Apr
59°
May
73°
Jun
77°
Jul
75°
Aug
67°
Sep
52°
Oct
40°
Nov
29°
Dec
Annual Precip: 14.4 in Annual Snow: 31.4 in
Current Conditions
64°F
Clear WNW 33.0 mph 42% Good soaking weather
Today 76° Low 53° Partly Sunny then Slight Chance Showers And Thunderstorms 17% precip
Wednesday 81° Low 58° Partly Sunny then Chance Showers And Thunderstorms 59% precip
Thursday 80° Low 56° Showers And Thunderstorms Likely 62% precip
Friday 83° Low 56° Partly Sunny then Slight Chance Showers And Thunderstorms 22% precip
Saturday 79° Low 53° Mostly Sunny then Chance Showers And Thunderstorms 44% precip
Water Chemistry Sampled 1975-09-30

The water at Desert Reef Hot Spring is slightly acidic (pH 6.3). It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and sulfate (traditionally used for skin conditions and inflammation).

pH 6.3 Slightly Acidic
pH influences mineral absorption through skin
Calcium 180 mg/L
May support bone density and joint health
Magnesium 78 mg/L
Known for muscle relaxation and stress relief
Sodium 270 mg/L
Supports circulation and skin hydration
Sulfate 210 mg/L
Traditionally used for skin conditions and inflammation
Chloride 98 mg/L
Natural antiseptic with skin health benefits
Iron 600 µg/L
Iron-rich springs may support circulation
Nearby Camping
Nearby Camping
Mingus Ranch 19.6 mi away

Overview Mingus Ranch is a cabin where guests can step back in time and feel like they're staying on an early 20th century homestead. The cabin was built in 1908 and was operated by the same family for six decades before it became a Forest Service property. In collaboration with the Frontier Pathways Scenic and Historic Byway and the Colorado State Historical Society, the cabin and neighboring barn have been renovated to match their original appearance and filled with period-specific furnitu...

Reservable Yes
Reserve on Recreation.gov →
Temperature
No data recorded
Avg Air Temp 52°F
Access
Road Access Roadside
Nearest Road County Road 110
Distance to Road 218 ft
Frequently Asked Questions
Where is Desert Reef Hot Spring located?
Desert Reef Hot Spring is located in Fremont County, Colorado, near Penrose. Coordinates: 38.3715°N, 105.0433°W.
How do I get to Desert Reef Hot Spring?
Desert Reef Hot Spring has Roadside road access, with the nearest road being County Road 110 (218 ft from the road).
Can I camp near Desert Reef Hot Spring?
Yes, Mingus Ranch is located nearby (19.6 miles away).
What minerals are in the water at Desert Reef Hot Spring?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 6.3 (slightly acidic).
Sources: USGS NWIS, Wikipedia