Unnamed Thermal Spring

Also known as: Black Rock Hot Spring
Taos County, New Mexico · Near Arroyo Seco
36.5280°N, 105.7130°W · 6,680 ft
106°F 51°F air · Good soaking weather 6,680 ft Open Short Walk Bureau of Land Management Camping nearby (14.7 mi)

The record files this as an unnamed thermal point, but OpenStreetMap calls it Black Rock Hot Spring, and Wikipedia describes Black Rock Hot Springs as a small system of thermal springs west of Arroyo Hondo. It sits on BLM land in Taos County, about seven miles from Arroyo Seco, with water above a hundred degrees, hot enough to soak in comfortably. Open access, public ground.

Location

Around 6,700 feet up, with heavy winters, close to three feet of snow across the season. Reaching it means a third of a mile of walking from a road that goes unnamed on the record, over Taos Field Office ground. For camping, Las Petacas Campground is the one on the books, about fifteen miles away. A photograph of the place does exist.

The best months on record are the snowy ones, so check the road before you drive out. Hot enough to ease into slowly and well below scalding. A 1976 sample found mildly alkaline water with sodium in the mix. No fee on record. Las Petacas is the nearest camp, a fair drive off.

History of This Spring

Black Rock Hot Springs, the name attached to this point on OpenStreetMap and Wikipedia, is described as a small cluster of thermal springs west of Arroyo Hondo. The USGS sampled it in July 1976.

Terrain

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

Aerial view of the ground around the spring

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
481 ft above the spring
Within a quarter mile, to the west
Cross-section through the spring

A slice through the ground from northwest to southeast, about 0.6 miles end to end.

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

Heat Below
120 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 71% 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
25°
Jan
31°
Feb
41°
Mar
50°
Apr
58°
May
71°
Jun
72°
Jul
70°
Aug
64°
Sep
52°
Oct
39°
Nov
27°
Dec
Annual Precip: 13.1 in Annual Snow: 34.1 in
Best Time to Visit
January Air 25°F · Water 106°F · +81° contrast
December Air 27°F · Water 106°F · +79° contrast
February Air 31°F · Water 106°F · +75° contrast
January offers 47°F more contrast than July
Current Conditions
51°F
Clear S 25.0 mph 89% Good soaking weather
Today 79° Low 47° Partly Sunny then Chance Showers And Thunderstorms 34% precip
Spring is +27° warmer
Wednesday 78° Low 47° Showers And Thunderstorms 80% precip
Spring is +28° warmer
Thursday 76° Low 44° Showers And Thunderstorms 91% precip
Spring is +30° warmer
Friday 77° Low 41° Showers And Thunderstorms Likely 60% precip
Spring is +29° warmer
Saturday 78° Low 41° Mostly Sunny then Slight Chance Showers And Thunderstorms 16% precip
Spring is +28° warmer
Water Chemistry Sampled 1976-07-22

The water at This spring is slightly alkaline (pH 8.0).

pH 8.0 Slightly Alkaline
pH influences mineral absorption through skin
Calcium 21 mg/L
May support bone density and joint health
Magnesium 5 mg/L
Known for muscle relaxation and stress relief
Sodium 145 mg/L
Supports circulation and skin hydration
Sulfate 150 mg/L
Traditionally used for skin conditions and inflammation
Chloride 58 mg/L
Natural antiseptic with skin health benefits
Where to Stay

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Nearby Camping
Las Petacas Campground 14.7 mi away

Set in a beautiful canyon quite close to Taos, there is good access to Rio Fernando de Taos for fishing.

Reserve on Recreation.gov →
Mile-High Advisory 6,680 ft

this spring sits at 6,680 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 27% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
106°F
Warm Hot Boiling
Water Temp 106°F (41°C)
Avg Air Temp 50°F
Above Ambient +56°F
Good soaking conditions September
Access
Open
Road Access Short Walk
Distance to Road 0.3 mi
Land
Ownership Federal
Agency Bureau of Land Management
Designation PUB
Unit Taos Field Office
Manager Bureau of Land Management
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at ?
has a water temperature of 106°F (41°C). This is considered a hot spring, well above body temperature.
Where is located?
is located in Taos County, New Mexico at 6,680 feet elevation, near Arroyo Seco. Coordinates: 36.5280°N, 105.7130°W.
How do I get to ?
has Short Walk road access (0.3 mi from the road).
Is free to visit?
has Open access. It is managed by Bureau of Land Management.
Can I camp near ?
Yes, Las Petacas Campground is located nearby (14.7 miles away).
What minerals are in the water at ?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 8.0 (slightly alkaline).