Charnock (Big Blue) Springs

Nye County, Nevada · Near Tonopah
38.9920°N, 117.0420°W · 5,480 ft
80°F 48°F air · Good soaking weather 5,480 ft Open Short Walk Bureau of Land Management
Aerial view of the ground around Charnock (Big Blue) Springs LiDAR bare-earth view of the same ground around Charnock (Big Blue) 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.

Charnock Springs, also called Big Blue Springs, rises warm on BLM-managed ground in Nye County, sixty-some miles from Tonopah. The water on file is mild, short of a proper soak. Access is open. The USGS site number attached to it is the same one recorded for Big Blue (A) Spring, so the two listings point at the same ground.

Location

Lower Mine Road is the nearest named road, about eight tenths of a mile off, so count on walking. Tonopah Field Office land, BLM. Nearly fifty-five hundred feet up, high desert, eight inches of annual precipitation, winter snow adding up to a bit over two feet.

Winter scores highest on file. Warm water only, no burn risk. BLM land, open, with no fee listed and no camping on record. The walk is under a mile each way, but nothing on record describes the route, so navigate on your own.

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 Charnock (Big Blue) Springs.

Setting
Open ground
Flat, open ground all around.
Highest ground nearby
14 ft above the spring
Within a quarter mile, to the east
Cross-section through the spring

A slice through the ground from southwest to northeast, about 0.6 miles end to end.

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

Heat Below
89 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 30% 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
31°
Jan
32°
Feb
41°
Mar
49°
Apr
58°
May
71°
Jun
79°
Jul
77°
Aug
68°
Sep
55°
Oct
41°
Nov
29°
Dec
Annual Precip: 7.9 in Annual Snow: 27.8 in
Best Time to Visit
December Air 29°F · Water 80°F · +51° contrast
January Air 31°F · Water 80°F · +49° contrast
February Air 32°F · Water 80°F · +48° contrast
December offers 50°F more contrast than July
Current Conditions
48°F
Clear NNW 33.2 mph 23% Good soaking weather
Tuesday 82° Low 47° Partly Sunny
Wednesday 81° Low 49° Sunny then Patchy Blowing Dust
Thursday 79° Low 49° Sunny
Spring is +1° warmer
Friday 79° Low 46° Sunny
Spring is +1° warmer
Saturday 82° Low 47° Sunny 1% precip
Mile-High Advisory 5,480 ft

Charnock (Big Blue) Springs sits at 5,480 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 22% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
80°F
Warm Hot Boiling
Water Temp 80°F (27°C)
Avg Air Temp 53°F
Above Ambient +27°F
Mild soaking conditions September
Access
Open
Road Access Short Walk
Nearest Road Lower Mine Road
Distance to Road 0.8 mi
Land
Ownership Federal
Agency Bureau of Land Management
Designation PUB
Unit Tonopah Field Office
Manager Bureau of Land Management
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at Charnock (Big Blue) Springs?
Charnock (Big Blue) Springs has a water temperature of 80°F (27°C). This is a warm thermal spring.
Where is Charnock (Big Blue) Springs located?
Charnock (Big Blue) Springs is located in Nye County, Nevada at 5,480 feet elevation, near Tonopah. Coordinates: 38.9920°N, 117.0420°W.
How do I get to Charnock (Big Blue) Springs?
Charnock (Big Blue) Springs has Short Walk road access, with the nearest road being Lower Mine Road (0.8 mi from the road).
Is Charnock (Big Blue) Springs free to visit?
Charnock (Big Blue) Springs has Open access. It is managed by Bureau of Land Management.
Sources: USGS NWIS