Warm Springs Creek Hot Springs

Boise County, Idaho · Near Idaho City
44.1540°N, 115.9930°W · 3,520 ft
167°F 3,520 ft Roadside Camping nearby (6.5 mi)
Very Hot Source, Use Extreme Caution

At 167°F, the source water at Warm Springs Creek Hot Springs 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.

Aerial view of the ground around Warm Springs Creek Hot Springs LiDAR bare-earth view of the same ground around Warm Springs 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.

Despite the mild name, Warm Springs Creek Hot Springs is scalding at the source, far beyond anything a person could enter. It lies on Castle Meadow Drive in Boise County, roughly twenty-four miles from Idaho City. Land ownership and public access are both missing from the record. The 1978 chemistry shows moderate dissolved solids, including iron, in mildly alkaline water.

Location

Castle Meadow Drive all but touches the spring, three yards away by the record, so this is a drive-up thermal feature with no walk at all. It lies at about thirty-five hundred feet. Snowfall averages about a hundred inches a year. The climate is moderately wet. No land unit or owner is named.

The recorded best months are the heart of winter. Swinging Bridge campground lies six or seven miles out. The water can scald instantly at the source; never enter without testing, and stay clear of the vent. Whether the public may visit is not on record, so find out before you drive in. The reading dates from November 1978.

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 Warm Springs Creek Hot Springs.

Setting
Valley floor
Gentle slopes rise on both sides.
Highest ground nearby
170 ft above the spring
Within a quarter mile, to the northeast
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
155 milliwatts per square meter of heat flow

That's about 2½ times the US average of 65. It's higher than at 95% 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
27°
Jan
31°
Feb
38°
Mar
44°
Apr
54°
May
63°
Jun
74°
Jul
73°
Aug
63°
Sep
48°
Oct
35°
Nov
27°
Dec
Annual Precip: 30.7 in Annual Snow: 100.0 in
Best Time to Visit
January Air 27°F · Water 167°F · +140° contrast
December Air 27°F · Water 167°F · +140° contrast
February Air 31°F · Water 167°F · +136° contrast
January offers 47°F more contrast than July
Current Conditions
Today 74° Low 48° Sunny
Spring is +93° warmer
Wednesday 82° Low 51° Sunny
Spring is +85° warmer
Thursday 74° Low 49° Rain Showers Likely 71% precip
Spring is +93° warmer
Friday 75° Low 47° Slight Chance Rain Showers 20% precip
Spring is +92° warmer
Saturday 78° Low 49° Sunny 5% precip
Spring is +89° warmer
Water Chemistry Sampled 1978-11-27

The water at Warm Springs Creek Hot Springs is slightly alkaline (pH 8.4) with 307 mg/L total dissolved solids.

pH 8.4 Slightly Alkaline
pH influences mineral absorption through skin
Higher mineral concentration for therapeutic soaking
Calcium 2 mg/L
May support bone density and joint health
Magnesium 0 mg/L
Known for muscle relaxation and stress relief
Sodium 90 mg/L
Supports circulation and skin hydration
Sulfate 27 mg/L
Traditionally used for skin conditions and inflammation
Chloride 19 mg/L
Natural antiseptic with skin health benefits
Iron 0 µg/L
Iron-rich springs may support circulation
Nearby Camping
Nearby Camping
Swinging Bridge 6.5 mi away

Overview Swinging Bridge Campground is located 10 miles north of Banks, Idaho just off Highway 55 at an elevation of 4,000 feet. The North Fork Payette River flows next to the highway, where extreme kayaking is a popular activity.Recreation The North Fork of the Payette River is a very popular location for expert kayaking. Whitewater rafting is nearby on the Main and South Fork sections of the Payette River. Anglers will find good to excellent fishing for whitefish and rainbow trout.Facili...

Reservable Yes
Reserve on Recreation.gov →
Temperature
167°F
Warm Hot Boiling
Water Temp 167°F (75°C)
Avg Air Temp 48°F
Above Ambient +119°F
Great soaking conditions September
Access
Road Access Roadside
Nearest Road Castle Meadow Drive
Distance to Road 9 ft
Frequently Asked Questions
What is the water temperature at Warm Springs Creek Hot Springs?
Warm Springs Creek Hot Springs has a water temperature of 167°F (75°C). This is considered a hot spring, well above body temperature.
Where is Warm Springs Creek Hot Springs located?
Warm Springs Creek Hot Springs is located in Boise County, Idaho at 3,520 feet elevation, near Idaho City. Coordinates: 44.1540°N, 115.9930°W.
How do I get to Warm Springs Creek Hot Springs?
Warm Springs Creek Hot Springs has Roadside road access, with the nearest road being Castle Meadow Drive (9 ft from the road).
Can I camp near Warm Springs Creek Hot Springs?
Yes, Swinging Bridge is located nearby (6.5 miles away).
What minerals are in the water at Warm Springs Creek Hot Springs?
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 8.4 (slightly alkaline). Total dissolved solids measure 307 mg/L.
Is it safe to soak at Warm Springs Creek Hot Springs?
No, not at the source. The water at Warm Springs Creek Hot Springs 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.
Sources: USGS NWIS