Unnamed Thermal Spring
Mono County, twenty-two miles from Mammoth Lakes: a nameless spring a short way off Test Station Road. Its recorded temperature is 91 degrees, soaking warm, water a person can stay in at length. Someone has photographed it and the image is on file. The elevation is missing, and so are the landowner and access status.
Test Station Road is the nearest named road, with the spring about 350 feet away, a short walk. The record gives no elevation. Snow averages under six feet per winter, precipitation about fifteen inches, dry numbers, with a cool yearly average. No landowner or unit is on record, and the land designation is blank too.
The record recommends the short days around the turn of the year. Oh Ridge campground is the nearest listed, ten miles off. With no owner on file, check who owns it before heading out. Ninety-one degrees is a comfortable soak in cool weather. Fee and chemistry are unrecorded.
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
- Gentle slope
- The ground tilts gently up to the southwest.
- Highest ground nearby
- 164 ft above the spring
- Within a quarter mile, to the southwest
A slice through the ground from southwest to northeast, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about twice the US average of 65. It's higher than at 75% 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 The outstanding lake and mountain views at Oh Ridge Campground make it a favorite spot for both families and anglers. It sits in the eastern Sierra Nevada Mountains in close proximity to the Ansel Adams Wilderness, Yosemite National Park and Mono Lake. The nearby town of June Lake offers the convenience of shopping and dining, while the surrounding land and lakes provide ample outdoor recreation opportunities.Recreation Oh Ridge campers have no problem staying busy and enjoying the o...
this spring is road-accessible, so you can bring more gear.
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