Spiers Springs

Lake County, California · Near Cobb
38.8380°N, 122.6530°W · 1,419 ft
79°F 61°F air · Good soaking weather 1,419 ft Roadside Camping nearby (20.4 mi)

A few miles from Cobb in Lake County, Spiers Springs comes up warm right off Big Canyon Road, about two hundred feet from it. Cobb is the closest town in the record. The water is warm, below what most people would call a soak. No owner is on file, and the public-access question is unanswered.

Location

Lake County hill country around fourteen hundred feet up, wet in winter and barely any snow. Big Canyon Road passes right by and the spring is roadside in the plainest sense. A picture exists in the record. No landowner is recorded, and there is no unit and no fee listed. Rain comes in the winter and the summers are dry.

The record picks December through February, and that lines up with the wet stretch of the year here. Twenty miles or so away, Warm Springs Rec Area is the only camping listed. The water is safe to touch. Ask about ownership before you stop; roadside does not mean public.

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 Spiers Springs.

Aerial view of the ground around Spiers Springs LiDAR bare-earth view of the same ground around Spiers 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.

Setting
Canyon floor
Steep ground climbs away on both sides of the spring.
Highest ground nearby
418 ft above the spring
Within a quarter mile, to the west
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
153 milliwatts per square meter of heat flow

That's about 2½ times the US average of 65. It's higher than at 95% 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
48°
Jan
49°
Feb
51°
Mar
57°
Apr
63°
May
73°
Jun
78°
Jul
77°
Aug
72°
Sep
64°
Oct
53°
Nov
47°
Dec
Annual Precip: 26.8 in Annual Snow: 1.4 in
Best Time to Visit
December Air 47°F · Water 79°F · +32° contrast
January Air 48°F · Water 79°F · +31° contrast
February Air 49°F · Water 79°F · +30° contrast
December offers 31°F more contrast than July
Current Conditions
61°F
NNE 0.0 mph 53% Good soaking weather
Tuesday 87° Low 63° Sunny
Wednesday 80° Low 58° Sunny 1% precip
Thursday 82° Low 57° Sunny 1% precip
Friday 88° Low 62° Sunny
Saturday 89° Low 66° Sunny
Where to Stay

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Nearby Camping
Warm Springs Rec Area 20.4 mi away

Overview Warm Springs Recreation Area is a day-use park located at Lake Sonoma, which is just a 45 minute drive north of Santa Rosa and a 2 hour trip from San Francisco. There is no overnight camping available at this facility World famous vineyards and a land rich in history surround the lake, where visitors enjoy boating, fishing and exploring the area's extensive trail network.Recreation The Woodland Ridge Nature Trail begins at the park and winds up the ridge, rewarding hikers with great...

Reservable Yes
Reserve on Recreation.gov →
Temperature
79°F
Warm Hot Boiling
Water Temp 79°F (26°C)
Avg Air Temp 61°F
Above Ambient +18°F
Mild soaking conditions September
Access
Road Access Roadside
Nearest Road Big Canyon Road
Distance to Road 204 ft
Frequently Asked Questions
What is the water temperature at Spiers Springs?
Spiers Springs has a water temperature of 79°F (26°C). This is a warm thermal spring.
Where is Spiers Springs located?
Spiers Springs is located in Lake County, California at 1,419 feet elevation, near Cobb. Coordinates: 38.8380°N, 122.6530°W.
How do I get to Spiers Springs?
Spiers Springs has Roadside road access, with the nearest road being Big Canyon Road (204 ft from the road).
Can I camp near Spiers Springs?
Yes, Warm Springs Rec Area is located nearby (20.4 miles away).