West Valley Reservoir Hot Spring

Modoc County, California · Near Alturas
41.1900°N, 120.3830°W · 4,817 ft
171°F 36°F air · Good soaking weather 4,817 ft Short Walk Camping nearby (10.1 mi)
Very Hot Source, Use Extreme Caution

At 171°F, the source water at West Valley Reservoir Hot Spring is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking. Always test the water temperature before entering.

Aerial view of the ground around West Valley Reservoir Hot Spring LiDAR bare-earth view of the same ground around West Valley Reservoir Hot Spring
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.

West Valley Reservoir Hot Spring comes up scalding in Modoc County, some twenty-two miles from Alturas. The water is far too hot to touch where it surfaces. Public access is blank in the record and no land owner is named, so it reads as a surveyed thermal point. No one has recorded a pool or a soak here, and the temperature alone says you would not want one at the source.

Location

The nearest road is under a mile away and carries no name in the record, so count on a walk of a bit under a mile each way over unrecorded ground. Elevation is around forty-eight hundred feet, high country. Winter is the real thing up here; the snow total tops five feet, with fair rain the rest of the year. No land unit or owner is recorded.

The record shows December through February as best, odd for a place with that much snow; check road conditions before relying on it. The walk in is a little under a mile. Patterson Guard Station, roughly ten miles out, is the camping on file. The water will burn you. Test with a thermometer or a quick splash before any skin goes in. Who owns the land, and if the public is welcome, is not in the record.

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 West Valley Reservoir Hot Spring.

Setting
Gentle slope
The ground tilts gently up to the southeast.
Highest ground nearby
113 ft above the spring
Within a quarter mile, to the southeast
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
88 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 27% 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
31°
Jan
32°
Feb
37°
Mar
44°
Apr
53°
May
64°
Jun
74°
Jul
73°
Aug
64°
Sep
51°
Oct
39°
Nov
30°
Dec
Annual Precip: 19.6 in Annual Snow: 63.4 in
Best Time to Visit
December Air 30°F · Water 171°F · +141° contrast
January Air 31°F · Water 171°F · +140° contrast
February Air 32°F · Water 171°F · +139° contrast
December offers 44°F more contrast than July
Current Conditions
36°F
Clear N 0.0 mph 75% Good soaking weather
Today 77° Low 42° Sunny 1% precip
Spring is +94° warmer
Wednesday 71° Low 40° Sunny then Isolated Showers And Thunderstorms 15% precip
Spring is +100° warmer
Thursday 69° Low 41° Sunny 9% precip
Spring is +102° warmer
Friday 76° Low 42° Sunny 1% precip
Spring is +95° warmer
Saturday 79° Low 44° Sunny
Spring is +92° warmer
Where to Stay

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Nearby Camping
Patterson Guard Station 10.1 mi away

Overview *Altitude is 7,080 feet above sea level*  Set on the edge of a meadow surrounded by Aspen, Fir and Pine trees, Patterson Guard Station has stood since 1921. It served the Modoc National Forest as a fully staffed fire office and guard station until 1981.   Just a few footsteps from the Summit Trail and one-quarter mile from the wilderness boundary, Patterson Guard Station can be your basecamp for trips into the South Warner Wilderness or the perfect place to disconnect and relax. The...

Reservable Yes
Reserve on Recreation.gov →
Temperature
171°F
Warm Hot Boiling
Water Temp 171°F (77°C)
Avg Air Temp 50°F
Above Ambient +122°F
Great soaking conditions September
Access
Road Access Short Walk
Distance to Road 0.8 mi
Frequently Asked Questions
What is the water temperature at West Valley Reservoir Hot Spring?
West Valley Reservoir Hot Spring has a water temperature of 171°F (77°C). This is considered a hot spring, well above body temperature.
Where is West Valley Reservoir Hot Spring located?
West Valley Reservoir Hot Spring is located in Modoc County, California at 4,817 feet elevation, near Alturas. Coordinates: 41.1900°N, 120.3830°W.
How do I get to West Valley Reservoir Hot Spring?
West Valley Reservoir Hot Spring has Short Walk road access (0.8 mi from the road).
Can I camp near West Valley Reservoir Hot Spring?
Yes, Patterson Guard Station is located nearby (10.1 miles away).
Is it safe to soak at West Valley Reservoir Hot Spring?
No, not at the source. The water at West Valley Reservoir Hot Spring reaches 171°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.