Fish Creek Hot Springs

Also known as: Iva Bell Hot Springs
Mono County, California · Near Mammoth Lakes
37.5320°N, 119.0250°W · 7,240 ft
110°F 7,240 ft Open Hike US Forest Service Camping nearby (8.2 mi)

Fish Creek Hot Springs, known on OpenStreetMap as Iva Bell Hot Springs, is a backcountry hot spring in Sierra National Forest. Getting there means a hike, roughly four and a half miles off the closest road. The water is right at the line between a hot soak and too hot. Access is open. Mammoth Lakes is the nearest town, seven miles or so.

Location

High Sierra, well over seven thousand feet, national forest land. Sixteen feet of snow is the yearly average. Sherwin Creek campground, eight miles or so away, is what our records show for camping, though the spring itself is a backcountry walk from the closest road and nothing closer is listed.

Winter shows up as the best season in our data, which sits awkwardly against that much snow. Judge the season by the snowfall. This is a hike, several miles one way. Open Forest Service land, no fee recorded. The water sits right at 110, so check it before you settle in. Chemistry comes from a 1993 sample.

History of Fish Creek Hot Springs

OpenStreetMap lists the same spot under the name Iva Bell Hot Springs. The USGS has sampled it, most recently in our records in 1993.

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 Fish Creek Hot Springs.

Aerial view of the ground around Fish Creek Hot Springs LiDAR bare-earth view of the same ground around Fish Creek 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
Canyon floor
Steep ground climbs away on both sides of the spring.
Highest ground nearby
717 ft above the spring
Within a quarter mile, to the southwest
Cross-section through the spring

A slice through the ground from north to south, about 0.6 miles end to end.

Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.

Heat Below
148 milliwatts per square meter of heat flow

That's about 2½ times the US average of 65. It's higher than at 93% 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
33°
Mar
38°
Apr
44°
May
57°
Jun
65°
Jul
64°
Aug
58°
Sep
48°
Oct
36°
Nov
28°
Dec
Annual Precip: 34.4 in Annual Snow: 199.6 in
Best Time to Visit
December Air 28°F · Water 110°F · +82° contrast
February Air 29°F · Water 110°F · +81° contrast
January Air 30°F · Water 110°F · +80° contrast
December offers 37°F more contrast than July
Current Conditions
NE 0.0 mph
Tuesday 68° Low 46° Sunny
Spring is +42° warmer
Wednesday 65° Low 43° Sunny
Spring is +45° warmer
Thursday 64° Low 41° Sunny
Spring is +46° warmer
Friday 69° Low 42° Sunny
Spring is +41° warmer
Saturday 70° Low 45° Sunny 1% precip
Spring is +40° warmer
Water Chemistry Sampled 1993-10-20

The water at Fish Creek Hot Springs is slightly acidic (pH 6.7) with 378 mg/L total dissolved solids.

pH 6.7 Slightly Acidic
pH influences mineral absorption through skin
Higher mineral concentration for therapeutic soaking
Calcium 20 mg/L
May support bone density and joint health
Magnesium 0 mg/L
Known for muscle relaxation and stress relief
Sodium 110 mg/L
Supports circulation and skin hydration
Sulfate 30 mg/L
Traditionally used for skin conditions and inflammation
Chloride 21 mg/L
Natural antiseptic with skin health benefits
Iron 13 µg/L
Iron-rich springs may support circulation
Where to Stay

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Nearby Camping
Sherwin Creek 8.2 mi away

Overview Sherwin Creek Campground is located in the eastern Sierra Nevada Mountains within 2 miles of the full-service community of Mammoth Lakes, California. Popular among anglers, hikers, off-road vehicle enthusiasts and photographers, the campground is near some of the most spectacular wilderness and outdoor recreation areas in the Sierras.Recreation With a motocross track and trails, Sherwin Creek is a hot spot for off-road vehicle enthusiasts. The area's majestic scenery and challenging...

Reservable Yes
Reserve on Recreation.gov →
Mile-High Advisory 7,240 ft

Fish Creek Hot Springs sits at 7,240 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 29% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
110°F
Warm Hot Boiling
Water Temp 110°F (43°C)
Avg Air Temp 44°F
Above Ambient +66°F
Great soaking conditions September
Access
Open
Road Access Hike
Distance to Road 4.5 mi
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 Fish Creek Hot Springs?
Fish Creek Hot Springs has a water temperature of 110°F (43°C). This is considered a hot spring, well above body temperature.
Where is Fish Creek Hot Springs located?
Fish Creek Hot Springs is located in Mono County, California at 7,240 feet elevation, near Mammoth Lakes. Coordinates: 37.5320°N, 119.0250°W.
How do I get to Fish Creek Hot Springs?
Fish Creek Hot Springs has Hike road access (4.5 mi from the road).
Is Fish Creek Hot Springs free to visit?
Fish Creek Hot Springs has Open access. It is managed by US Forest Service.
Can I camp near Fish Creek Hot Springs?
Yes, Sherwin Creek is located nearby (8.2 miles away).
What minerals are in the water at Fish Creek Hot Springs?
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 6.7 (slightly acidic). Total dissolved solids measure 378 mg/L.