Unnamed Thermal Spring
Off Old Long Valley Road about five miles from Clearlake, an unnamed spring the record puts at 81 degrees. Lukewarm, in other words. It sits in Lake County at low elevation, and the record has nothing on ownership or on public access. No photograph or chemistry is on file, and OpenStreetMap has nothing to add.
The spring is a few hundred feet from Old Long Valley Road, which makes it roadside by the record's classes. Elevation is about fourteen hundred feet. Around twenty-three inches of precipitation falls in a year, with snow a few inches at most. The average temperature on file is in the low sixties.
Winter is the time on file. Little Stony campground is eighteen miles or so away. With ownership unrecorded, check before you visit. No fee noted. An 81 degree reading means a cold day will feel cold in the water, so pick your weather. Clearlake is close enough that asking around there is the sensible first step.
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.
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
- Hillside
- The spring sits on a steep slope that climbs to the northwest.
- Highest ground nearby
- 403 ft above the spring
- Within a quarter mile, to the northwest
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.
That's about 3 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.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
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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...
this spring is road-accessible, so you can bring more gear.
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