Vaughn Hot Spring

Boise County, Idaho · Near Idaho City
43.7380°N, 115.5830°W · 3,680 ft
154°F 35°F air · Good soaking weather 3,680 ft Open Short Walk US Forest Service Camping nearby (1.4 mi)
Very Hot Source, Use Extreme Caution

At 154°F, the source water at Vaughn Hot Spring 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 Vaughn Hot Spring LiDAR bare-earth view of the same ground around Vaughn Hot Spring
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.

Vaughn Hot Spring comes out above 150 degrees, scalding, on Boise National Forest ground in Boise County about fourteen miles from Idaho City. A few hundred feet of walking from Middle Fork Road gets you there. Access is open. The source water will burn. OpenStreetMap lists it under this name and so does the USGS.

Location

About 3,700 feet, with roughly ten feet of snow and thirty inches of precipitation; annual temperatures average close to fifty. Middle Fork Road passes a few hundred feet away. Forest Service holding, designation National Forest and nothing finer. Snow closes the approach for a good part of the year, though the record does not say when the road opens.

December through February are flagged as best. Ninemeyer Campground is close, under one and a half miles off. Chemistry was never sampled, though the USGS does track it as a site. Source water this hot burns on contact; any soak depends on a cooled pool the record does not confirm.

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 Vaughn Hot Spring.

Setting
Hillside
The spring sits on a steep slope that climbs to the south.
Highest ground nearby
282 ft above the spring
Within a quarter mile, to the south
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
138 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 88% 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
29°
Jan
31°
Feb
38°
Mar
43°
Apr
53°
May
64°
Jun
75°
Jul
74°
Aug
63°
Sep
49°
Oct
37°
Nov
27°
Dec
Annual Precip: 30.1 in Annual Snow: 122.0 in
Best Time to Visit
December Air 27°F · Water 154°F · +127° contrast
January Air 29°F · Water 154°F · +125° contrast
February Air 31°F · Water 154°F · +123° contrast
December offers 48°F more contrast than July
Current Conditions
35°F
S 0.0 mph 93% Good soaking weather
Today 74° Low 49° Sunny
Spring is +80° warmer
Wednesday 81° Low 53° Sunny
Spring is +73° warmer
Thursday 72° Low 49° Showers And Thunderstorms Likely 73% precip
Spring is +82° warmer
Friday 73° Low 48° Mostly Sunny then Slight Chance Rain Showers 20% precip
Spring is +81° warmer
Saturday 76° Low 50° Sunny 5% precip
Spring is +78° warmer
Nearby Camping
Nearby Camping
Ninemeyer Campground 1.4 mi away

Overview:Due to a wildfire, there are no amenities at the campground.  Currently there are no developed campfire rings therefore when Stage 1 fire restrictions area in effect, no fires are permitted.A stay at Ninemeyer Campground enables guests to enjoy all the beauty and recreation offered along the (Middle Fork Boise River Road) Forest Service (FS) Road 268. Weather is usually good from mid-May through late September and is easily accessible by car in good weather, although the road is some...

Reserve on Recreation.gov →
Temperature
154°F
Warm Hot Boiling
Water Temp 154°F (68°C)
Avg Air Temp 49°F
Above Ambient +105°F
Great soaking conditions September
Access
Open
Road Access Short Walk
Nearest Road Middle Fork Road
Distance to Road 381 ft
Land
Ownership Federal
Agency US Forest Service
Designation National Forest
Unit Boise National Forest
Manager US Forest Service
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at Vaughn Hot Spring?
Vaughn Hot Spring has a water temperature of 154°F (68°C). This is considered a hot spring, well above body temperature.
Where is Vaughn Hot Spring located?
Vaughn Hot Spring is located in Boise County, Idaho at 3,680 feet elevation, near Idaho City. Coordinates: 43.7380°N, 115.5830°W.
How do I get to Vaughn Hot Spring?
Vaughn Hot Spring has Short Walk road access, with the nearest road being Middle Fork Road (381 ft from the road).
Is Vaughn Hot Spring free to visit?
Vaughn Hot Spring has Open access. It is managed by US Forest Service.
Can I camp near Vaughn Hot Spring?
Yes, Ninemeyer Campground is located nearby (1.4 miles away).
Is it safe to soak at Vaughn Hot Spring?
No, not at the source. The water at Vaughn Hot Spring reaches 154°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.