Unnamed Thermal Spring

Mono County, California · Near Bridgeport
37.9890°N, 119.1390°W · 6,383 ft
72°F 44°F air · Good soaking weather 6,383 ft Short Walk Camping nearby (7.2 mi)

Nineteen miles from Bridgeport, Mono County, sits a nameless spring that reads 72 degrees, tepid. There is a picture of it on file. The owner of the land and the access status are not, so this is a spot to research before visiting. Elevation is a bit under sixty-four hundred feet.

Location

Call it five hundred feet on foot from a road the record does not identify. Winters up here run deep, over eight feet of snow on average, and annual precipitation is about twenty inches. No land unit or designation is recorded, and the annual mean temperature is in the high forties.

Mid to late winter leads the calendar on file. Lower Virginia Creek Primitive Campground is seven miles distant, primitive as the name says. Ownership is blank, so confirm you may be there. No fee recorded. Seventy-two degree water is for wading on a warm afternoon. No chemistry or second name is on record.

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
Hillside
The spring sits on a steep slope that climbs to the west.
Highest ground nearby
311 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
143 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 91% 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
33°
Jan
31°
Feb
36°
Mar
43°
Apr
51°
May
64°
Jun
72°
Jul
71°
Aug
64°
Sep
53°
Oct
41°
Nov
31°
Dec
Annual Precip: 19.9 in Annual Snow: 103.2 in
Best Time to Visit
February Air 31°F · Water 72°F · +41° contrast
December Air 31°F · Water 72°F · +41° contrast
January Air 33°F · Water 72°F · +39° contrast
February offers 40°F more contrast than August
Current Conditions
44°F
SW 3.7 mph 45% Good soaking weather
Tuesday 67° Low 45° Sunny
Spring is +5° warmer
Wednesday 63° Low 44° Sunny
Spring is +9° warmer
Thursday 62° Low 42° Sunny
Spring is +10° warmer
Friday 63° Low 43° Sunny
Spring is +9° warmer
Saturday 66° Low 45° Sunny 2% precip
Spring is +6° warmer
Where to Stay

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Nearby Camping
Lower Virginia Creek Primitive Campground 7.2 mi away

Rustic campsites with fire rings in Jeffrey Pine Forest. There is no trash service please pack out your trash.

Reserve on Recreation.gov →
Mile-High Advisory 6,383 ft

this spring sits at 6,383 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 26% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
72°F
Warm Hot Boiling
Water Temp 72°F (22°C)
Avg Air Temp 49°F
Above Ambient +23°F
Mild soaking conditions September
Access
Road Access Short Walk
Distance to Road 522 ft
Frequently Asked Questions
What is the water temperature at ?
has a water temperature of 72°F (22°C). This is a warm thermal spring.
Where is located?
is located in Mono County, California at 6,383 feet elevation, near Bridgeport. Coordinates: 37.9890°N, 119.1390°W.
How do I get to ?
has Short Walk road access (522 ft from the road).
Can I camp near ?
Yes, Lower Virginia Creek Primitive Campground is located nearby (7.2 miles away).