The Tub

Also known as: Crab Cooker Hot Springs
Mono County, California · Near Mammoth Lakes
37.6640°N, 118.8020°W · 6,975 ft
167°F 37°F air · Good soaking weather 6,975 ft Open Short Walk CITY Camping nearby (6.8 mi)
Very Hot Source, Use Extreme Caution

At 167°F, the source water at The Tub is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking. Always test the water temperature before entering.

The Tub, which OpenStreetMap calls Crab Cooker Hot Springs, is a scalding source on Los Angeles Water and Power land, eleven miles or so out of Mammoth Lakes in Mono County. The source measured 167 degrees. Access is open on file. Neutral pH in a 1973 sample.

Location

Under a quarter mile from an unnamed road. Near seven thousand feet, where winters average seven feet of snow and the yearly mean sits in the upper forties. Sixteen inches of precipitation. The land is city-owned, held by LADWP.

The best season on file is winter. Crowley Lake Campground sits roughly seven miles away. Scalding at the source; it will burn skin at once, so do not enter untested water. The chemistry dates to 1973. No fee on record.

History of The Tub

Two names attach to this one. The record calls it The Tub while OpenStreetMap has it as Crab Cooker Hot Springs and tags the place as a bath site. USGS keeps a site here with a sample from July 1973, and the discharge they logged amounts to a trickle.

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 The Tub.

Aerial view of the ground around The Tub LiDAR bare-earth view of the same ground around The Tub
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
Open ground
Flat, open ground all around.
Highest ground nearby
30 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
132 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 83% 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
30°
Jan
29°
Feb
34°
Mar
41°
Apr
48°
May
61°
Jun
68°
Jul
67°
Aug
61°
Sep
50°
Oct
39°
Nov
29°
Dec
Annual Precip: 16.2 in Annual Snow: 83.6 in
Best Time to Visit
February Air 29°F · Water 167°F · +138° contrast
December Air 29°F · Water 167°F · +138° contrast
January Air 30°F · Water 167°F · +137° contrast
February offers 39°F more contrast than July
Current Conditions
37°F
Clear WNW 25.0 mph 48% Good soaking weather
Tuesday 77° Low 39° Sunny
Spring is +90° warmer
Wednesday 74° Low 37° Sunny
Spring is +93° warmer
Thursday 74° Low 35° Sunny
Spring is +93° warmer
Friday 74° Low 36° Sunny
Spring is +93° warmer
Saturday 76° Low 39° Sunny 1% precip
Spring is +91° warmer
Water Chemistry Sampled 1973-07-28

The water at The Tub is slightly alkaline (pH 7.3). It is notably rich in sodium (supports circulation and skin hydration) and chloride (natural antiseptic with skin health benefits).

pH 7.3 Slightly Alkaline
pH influences mineral absorption through skin
Calcium 21 mg/L
May support bone density and joint health
Magnesium 1 mg/L
Known for muscle relaxation and stress relief
Sodium 310 mg/L
Supports circulation and skin hydration
Sulfate 70 mg/L
Traditionally used for skin conditions and inflammation
Chloride 150 mg/L
Natural antiseptic with skin health benefits
Iron 30 µg/L
Iron-rich springs may support circulation
Where to Stay

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Nearby Camping
Crowley Lake Campground 6.8 mi away

Overview Crowley Lake Campground offers 47 RV/tent sites, maximum recommended RV length is 30 feet. All sites include a fire pit, picnic table and a lantern holder. No hook-up. Potable water is available. Dump station fee is $10.00, no passes accepted. Closest amenities are 2 miles south in Crowley, or 10 miles north in Mammoth Lakes. Recreation Popular activities include lake and stream fishing, boating, windsurfing, horseback riding, hiking, and wildlife viewing. Facilities Crowley Lake...

Reservable Yes
Reserve on Recreation.gov →
Mile-High Advisory 6,975 ft

The Tub sits at 6,975 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 28% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
167°F
Warm Hot Boiling
Water Temp 167°F (75°C)
Avg Air Temp 47°F
Above Ambient +121°F
Great soaking conditions September
Access
Open
Road Access Short Walk
Distance to Road 0.2 mi
Bath Type Hot spring
Land
Ownership Local
Agency CITY
Designation LOTH
Unit Los Angeles Department of Water and Power
Manager CITY
Protection 4 - No known protection
Frequently Asked Questions
What is the water temperature at The Tub?
The Tub has a water temperature of 167°F (75°C). This is considered a hot spring, well above body temperature.
Where is The Tub located?
The Tub is located in Mono County, California at 6,975 feet elevation, near Mammoth Lakes. Coordinates: 37.6640°N, 118.8020°W.
How do I get to The Tub?
The Tub has Short Walk road access (0.2 mi from the road).
Is The Tub free to visit?
The Tub has Open access. It is managed by CITY.
Can I camp near The Tub?
Yes, Crowley Lake Campground is located nearby (6.8 miles away).
What minerals are in the water at The Tub?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 7.3 (slightly alkaline).
Is it safe to soak at The Tub?
No, not at the source. The water at The Tub reaches 167°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.