Unnamed Thermal Spring

Lake County, California · Near Soda Bay
38.9860°N, 122.7360°W · 1,321 ft
95°F 61°F air · Good soaking weather 1,321 ft Short Walk Camping nearby (21.9 mi)

A couple of miles from Soda Bay, Lake County, an unnamed spring with a reading of 95 degrees on record. That is comfortable soaking warmth, a little under hot-tub heat. Someone has photographed it; the picture is on file. What is missing is any word on ownership, and on whether the public can go in.

Location

The nearest road is under five hundred feet of walking away, and it goes unnamed on the record. This is low ground, around thirteen hundred feet. Rain and snow together come to roughly twenty-seven inches in a year, almost all of it rain. Snow barely registers in the average.

The record's preferred months are the winter ones. Letts Lake Campground is the closest one on file, and it is a long way off, around twenty-two miles. Ownership and access are both blank on file, so do the homework first. No fee is recorded. Ninety-five degree water is best appreciated on a cool evening.

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 this spring.

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

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

That's about 2½ times the US average of 65. It's higher than at 98% 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
47°
Jan
48°
Feb
51°
Mar
57°
Apr
63°
May
72°
Jun
78°
Jul
78°
Aug
73°
Sep
64°
Oct
53°
Nov
46°
Dec
Annual Precip: 26.7 in Annual Snow: 4.5 in
Best Time to Visit
December Air 46°F · Water 95°F · +49° contrast
January Air 47°F · Water 95°F · +48° contrast
February Air 48°F · Water 95°F · +47° contrast
December offers 32°F more contrast than August
Current Conditions
61°F
NNE 0.0 mph 53% Good soaking weather
Today 81° Low 58° Sunny
Spring is +14° warmer
Wednesday 75° Low 57° Sunny 4% precip
Spring is +20° warmer
Thursday 77° Low 59° Sunny 1% precip
Spring is +18° warmer
Friday 82° Low 61° Sunny
Spring is +13° warmer
Saturday 83° Low 61° Sunny
Spring is +12° warmer
Where to Stay

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Nearby Camping
Letts Lake Campground 21.9 mi away

Overview This location is available on a first-come, first-served basis only. Visitors are required to physically arrive at the campground to purchase and claim a site.Once on-site, you are able to pay for your campsite(s) by scanning a QR code using the Recreation.gov mobile app, and the Scan and Pay feature.In order to utilize Scan & Pay on site, you will need to first download the free Recreation.gov mobile app https://www.recreation.gov/mobile-app prior to your arrival as some remote area...

Reservable Yes
Reserve on Recreation.gov →
Temperature
95°F
Warm Hot Boiling
Water Temp 95°F (35°C)
Avg Air Temp 61°F
Above Ambient +34°F
Warm air, warm water September
Access
Road Access Short Walk
Distance to Road 465 ft
Frequently Asked Questions
What is the water temperature at ?
has a water temperature of 95°F (35°C). This is a warm thermal spring.
Where is located?
is located in Lake County, California at 1,321 feet elevation, near Soda Bay. Coordinates: 38.9860°N, 122.7360°W.
How do I get to ?
has Short Walk road access (465 ft from the road).
Can I camp near ?
Yes, Letts Lake Campground is located nearby (21.9 miles away).