Mono Hot Springs

Mono County, California · Near Mammoth Lakes
37.3270°N, 119.0180°W · 6,561 ft
109°F 6,561 ft Open Roadside US Forest Service Camping nearby (0.1 mi)

Mono Hot Springs is a summer resort and campground built around a group of hot springs in the Sierra National Forest. Wikipedia puts it in Fresno County, seventy miles northeast of Fresno on State Route 168; this record files it under Mono County with Mammoth Lakes as the nearest city. The water is soaking temperature, a bit over body heat, and public access is listed as open.

Location

The spring is twelve feet from the road, with the Mono Hot Springs campground right there, under two hundred yards away. This is Forest Service land at around 6,500 feet with a very snowy winter and a wet year. The resort is seasonal, summer only per Wikipedia, and the campground carries the same name as the springs.

Wikipedia describes a summer operation, and the snowfall total explains why. The best months on file say winter, which does not square with that; go with the resort's season. Camping is on site. Temperature is comfortable for soaking with no burn risk. No fee is recorded here; a resort may set its own.

History of Mono Hot Springs

Wikipedia says the place was formerly called Lower Hot Springs and Lower Mineral Hot Springs, and describes it as a summer resort and campground at a group of hot springs in Fresno County, reached by State Route 168 from Fresno.

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 Mono Hot Springs.

Aerial view of the ground around Mono Hot Springs LiDAR bare-earth view of the same ground around Mono Hot 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
Valley floor
Gentle slopes rise on both sides.
Highest ground nearby
208 ft above the spring
Within a quarter mile, to the northeast
Cross-section through the spring

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.

Heat Below
145 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
35°
Mar
39°
Apr
46°
May
59°
Jun
66°
Jul
66°
Aug
60°
Sep
50°
Oct
39°
Nov
30°
Dec
Annual Precip: 34.2 in Annual Snow: 175.4 in
Best Time to Visit
December Air 30°F · Water 109°F · +79° contrast
February Air 31°F · Water 109°F · +78° contrast
January Air 33°F · Water 109°F · +77° contrast
December offers 36°F more contrast than August
Current Conditions
Tuesday 75° Low 48° Sunny
Spring is +34° warmer
Wednesday 71° Low 45° Sunny
Spring is +38° warmer
Thursday 71° Low 44° Sunny
Spring is +38° warmer
Friday 75° Low 45° Sunny
Spring is +34° warmer
Saturday 76° Low 48° Sunny 1% precip
Spring is +33° warmer
Where to Stay

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Nearby Camping
Mono Hot Springs 0.1 mi away

Overview Mono Hot Springs Campground sits above Kaiser Pass in the High Sierra, on the South Fork of the San Joaquin River in an area known for its hot mineral baths. The camp is divided into two sections that are separated by Mono Hot Springs Resort, and some sites are shaded by aspen and lodgepole pine. The campground sits at an elevation of 6,700 feet with many cliffs in the area. It makes a great base for exploring the nearby Ansel Adams and John Muir Wilderness areas or for simply relax...

Reservable Yes
Reserve on Recreation.gov →
Mile-High Advisory 6,561 ft

Mono Hot Springs sits at 6,561 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
109°F
Warm Hot Boiling
Water Temp 109°F (43°C)
Avg Air Temp 46°F
Above Ambient +63°F
Good soaking conditions September
Access
Open
Road Access Roadside
Distance to Road 12 ft
Land
Ownership Federal
Agency US Forest Service
Designation National Forest
Unit Sierra National Forest
Manager US Forest Service
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at Mono Hot Springs?
Mono Hot Springs has a water temperature of 109°F (43°C). This is considered a hot spring, well above body temperature.
Where is Mono Hot Springs located?
Mono Hot Springs is located in Mono County, California at 6,561 feet elevation, near Mammoth Lakes. Coordinates: 37.3270°N, 119.0180°W.
How do I get to Mono Hot Springs?
Mono Hot Springs has Roadside road access (12 ft from the road).
Is Mono Hot Springs free to visit?
Mono Hot Springs has Open access. It is managed by US Forest Service.
Can I camp near Mono Hot Springs?
Yes, Mono Hot Springs is located nearby (0.1 miles away).
Sources: Wikipedia