Hot Springs (Surprise Valley)

Modoc County, California · Near Alturas
41.5340°N, 120.0780°W · 4,511 ft
208°F 43°F air · Good soaking weather 4,511 ft Roadside Camping nearby (10.3 mi)
Dangerously Hot, Not Safe for Soaking

Hot Springs (Surprise Valley) reaches 208°F, far above safe soaking levels. Contact with this water will cause severe burns. Look for cooled downstream pools or view from a safe distance only.

In Surprise Valley, Modoc County, this is one of the hottest sources on record, near boiling. Alturas is twenty-five miles off. It sits a few dozen feet from a road. The record lists no landowner and gives no access status. Treat it as a thing to see from a distance, and as a place where you need to know whose ground you are standing on before you step off the road.

Location

Roadside, eighty-some feet from the pavement or gravel, the record does not specify. You are in the mid four thousands for elevation, in the northeast corner of the state. Four feet of snow, give or take, falls each winter; the rest of the year stays dry. Pepperdine Equestrian Campground, about ten miles off, is the closest listed.

December through February rate highest. Do not go near the water's edge. This water scalds instantly, and a slip would be a medical emergency. With no owner listed, assume private land until you learn otherwise. One photo is on file. Chemistry, fee, USGS site and flow are all blank.

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 Hot Springs (Surprise Valley).

Aerial view of the ground around Hot Springs (Surprise Valley) LiDAR bare-earth view of the same ground around Hot Springs (Surprise Valley)
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
Open ground
Flat, open ground all around.
Highest ground nearby
5 ft above the spring
Within a quarter mile, to the south
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
91 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 32% 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
32°
Feb
38°
Mar
46°
Apr
55°
May
65°
Jun
75°
Jul
74°
Aug
66°
Sep
52°
Oct
39°
Nov
29°
Dec
Annual Precip: 15.6 in Annual Snow: 49.0 in
Best Time to Visit
December Air 29°F · Water 208°F · +179° contrast
January Air 30°F · Water 208°F · +178° contrast
February Air 32°F · Water 208°F · +176° contrast
December offers 46°F more contrast than July
Current Conditions
43°F
NW 4.5 mph 51% Good soaking weather
Tuesday 81° Low 39° Sunny 2% precip
Spring is +127° warmer
Wednesday 75° Low 42° Sunny then Slight Chance Showers And Thunderstorms 15% precip
Spring is +133° warmer
Thursday 74° Low 41° Slight Chance Rain Showers 15% precip
Spring is +134° warmer
Friday 79° Low 40° Sunny 4% precip
Spring is +129° warmer
Saturday 83° Low 43° Sunny
Spring is +125° warmer
Where to Stay

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Nearby Camping
Pepperdine Equestrian Campground 10.3 mi away

The campsites are mostly shaded and enjoy serene surroundings and are equiped with 12' X 12' metal corrals. A short trail runs over to the start of the Summit Trail where it heads south into the South Warner Wilderness.  No wilderness permits are required however, if you plan to use a camp or backpack stove or charcoal barbeque or have a campfire outside the developed campground, you will need a current California Campfire Permit.

Reserve on Recreation.gov →
Temperature
208°F
Warm Hot Boiling
Water Temp 208°F (98°C)
Avg Air Temp 50°F
Above Ambient +158°F
Access
Road Access Roadside
Distance to Road 84 ft
Frequently Asked Questions
What is the water temperature at Hot Springs (Surprise Valley)?
Hot Springs (Surprise Valley) has a water temperature of 208°F (98°C). This is considered a hot spring, well above body temperature.
Where is Hot Springs (Surprise Valley) located?
Hot Springs (Surprise Valley) is located in Modoc County, California at 4,511 feet elevation, near Alturas. Coordinates: 41.5340°N, 120.0780°W.
How do I get to Hot Springs (Surprise Valley)?
Hot Springs (Surprise Valley) has Roadside road access (84 ft from the road).
Can I camp near Hot Springs (Surprise Valley)?
Yes, Pepperdine Equestrian Campground is located nearby (10.3 miles away).
Is it safe to soak at Hot Springs (Surprise Valley)?
No, not at the source. The water at Hot Springs (Surprise Valley) reaches 208°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.