Basset Hot Spring

Boise County, Idaho · Near Idaho City
43.7180°N, 115.5630°W · 3,680 ft
Hot 33°F air · Good soaking weather 3,680 ft Open Hike US Forest Service Camping nearby (2.6 mi)
Aerial view of the ground around Basset Hot Spring LiDAR bare-earth view of the same ground around Basset 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.

Fifteen miles from Idaho City, on Boise National Forest land in Boise County, Basset Hot Spring goes into the record as hot with no number attached, so no figure can be quoted. Access is open on Forest Service ground. You walk in, a bit under two miles from Middle Fork Road. Ninemeyer Campground is the listed camping, a couple of miles off.

Location

Under four thousand feet, and still a big snow total, around ten feet each winter, and a wet year by precipitation total. National forest, no designation beyond that. The approach is on foot, a hike of a mile and three quarters. Ninemeyer Campground is close to the spring by the record's numbers.

No season ranking exists for this spring because no temperature does. Ten feet of snow a year says winter access on foot will be hard. Ninemeyer is the campground to aim for. The spring is called hot in the source, so treat the water with respect until you have felt it. Open access on national forest land.

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 Basset Hot Spring.

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

That's about twice the US average of 65. It's higher than at 65% 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
24°
Jan
27°
Feb
33°
Mar
38°
Apr
49°
May
59°
Jun
70°
Jul
69°
Aug
59°
Sep
44°
Oct
32°
Nov
23°
Dec
Annual Precip: 30.1 in Annual Snow: 122.0 in
Current Conditions
33°F
SSE 0.0 mph 97% Good soaking weather
Today 66° Low 46° Sunny
Wednesday 72° Low 51° Sunny 1% precip
Thursday 64° Low 46° Showers And Thunderstorms Likely 73% precip
Friday 64° Low 45° Mostly Sunny then Slight Chance Rain Showers 20% precip
Saturday 68° Low 47° Sunny 5% precip
Nearby Camping
Nearby Camping
Ninemeyer Campground 2.6 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
Hot
Warm Hot Boiling
Avg Air Temp 44°F
Access
Open
Road Access Hike
Nearest Road Middle Fork Road
Distance to Road 1.7 mi
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 Basset Hot Spring?
Basset Hot Spring is classified as hot. An exact temperature measurement has not been recorded.
Where is Basset Hot Spring located?
Basset Hot Spring is located in Boise County, Idaho at 3,680 feet elevation, near Idaho City. Coordinates: 43.7180°N, 115.5630°W.
How do I get to Basset Hot Spring?
Basset Hot Spring has Hike road access, with the nearest road being Middle Fork Road (1.7 mi from the road).
Is Basset Hot Spring free to visit?
Basset Hot Spring has Open access. It is managed by US Forest Service.
Can I camp near Basset Hot Spring?
Yes, Ninemeyer Campground is located nearby (2.6 miles away).
Sources: USGS NWIS