Bridge Hot Springs

Camas County, Idaho · Near Fairfield
43.5400°N, 115.2880°W · 4,358 ft
138°F 4,358 ft Roadside Camping nearby (0.4 mi)

Hot enough to hurt. Bridge Hot Springs in Camas County runs in the high 130s at the source, which rules out stepping straight in. It lies off East Hot Springs drive, roughly 28 miles from Fairfield, with Elks Flat Campground within half a mile. No land owner appears on file and access is not recorded, so whether you can legally walk up to it is an open question.

Location
29 miles from Glenns Ferry, ID

Roadside, a bit over a hundred feet from the pavement. The spring sits at around 4,400 feet in a part of south central Idaho that gets about eight feet of snow a year and modest rain otherwise. That puts it between the wet forests to the north and the dry plain to the south. A photo is on file if you want a sense of the ground before committing to the drive.

Plan on winter if you go by the best months on file, but eight feet of snow means the road surface matters more than the calendar. The campground is close. Water this hot has to be cooled before it touches skin, and the single pH reading on record, a high one, dates to 1981. Confirm that the spring is open to the public; the record does not say.

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 Bridge Hot Springs.

Aerial view of the ground around Bridge Hot Springs LiDAR bare-earth view of the same ground around Bridge 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
Hillside
The spring sits on a steep slope that climbs to the south.
Highest ground nearby
457 ft above the spring
Within a quarter mile, to the south
Cross-section through the spring

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

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

Heat Below
125 milliwatts per square meter of heat flow

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.

Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.

Monthly Climate
25°
Jan
28°
Feb
35°
Mar
41°
Apr
51°
May
62°
Jun
72°
Jul
71°
Aug
61°
Sep
47°
Oct
34°
Nov
23°
Dec
Annual Precip: 24.2 in Annual Snow: 94.9 in
Best Time to Visit
December Air 23°F · Water 138°F · +115° contrast
January Air 25°F · Water 138°F · +113° contrast
February Air 28°F · Water 138°F · +110° contrast
December offers 49°F more contrast than July
Current Conditions
NNW 1.4 mph
Today 76° Low 41° Sunny
Spring is +62° warmer
Wednesday 82° Low 46° Sunny
Spring is +56° warmer
Thursday 75° Low 41° Showers And Thunderstorms Likely 73% precip
Spring is +63° warmer
Friday 75° Low 39° Mostly Sunny then Slight Chance Rain Showers 18% precip
Spring is +63° warmer
Saturday 78° Low 41° Sunny 4% precip
Spring is +60° warmer
Water Chemistry Sampled 1981-08-04

The water at Bridge Hot Springs is alkaline (pH 9.5).

pH 9.5 Alkaline
pH influences mineral absorption through skin
Where to Stay

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Nearby Camping
Elks Flat Campground 0.4 mi away

Overview Elks Flat Campground is situated on the banks of the South Fork Boise River, at the foot of the Trinity Mountain Range in Idaho. It is five miles north of the town of Pine. Visitors enjoy fishing, swimming and exploring trails in the surrounding area. Recreation The South Fork Boise River runs along the eastern edge of the campground, offering rafting, swimming and fishing for rainbow trout. Paradise Hot Springs is nearby. Green Creek Trail 270, a 4.5-mile trail for hiking, horsebac...

Reservable Yes
Reserve on Recreation.gov →
Temperature
138°F
Warm Hot Boiling
Water Temp 138°F (59°C)
Avg Air Temp 46°F
Above Ambient +92°F
Great soaking conditions September
Access
Road Access Roadside
Nearest Road East Hot Springs drive
Distance to Road 113 ft
Frequently Asked Questions
What is the water temperature at Bridge Hot Springs?
Bridge Hot Springs has a water temperature of 138°F (59°C). This is considered a hot spring, well above body temperature.
Where is Bridge Hot Springs located?
Bridge Hot Springs is located in Camas County, Idaho at 4,358 feet elevation, near Fairfield. Coordinates: 43.5400°N, 115.2880°W.
How do I get to Bridge Hot Springs?
Bridge Hot Springs has Roadside road access, with the nearest road being East Hot Springs drive (113 ft from the road).
Can I camp near Bridge Hot Springs?
Yes, Elks Flat Campground is located nearby (0.4 miles away).
What minerals are in the water at Bridge Hot Springs?
Water chemistry analysis shows the presence of pH. The pH is 9.5 (alkaline).
Is it safe to soak at Bridge Hot Springs?
With care. At 138°F Bridge Hot Springs is hot enough to need short sessions, fifteen to twenty minutes, and plenty of water. Enter slowly and get out if you feel light-headed.
Sources: USGS NWIS