Sulphur Creek
Sulphur Creek is a hot source in Lake County, four and a half miles from Cobb, with water at 120 degrees, the kind of heat that burns skin on contact. It is close to a road. The land has no recorded owner and no access status, so the record cannot tell you if you may approach it.
Nearly three hundred feet from an unnamed roadway, which the record classes as roadside. About two thousand feet up. Wet, thirty-four inches falling in a year, though snow almost never sticks, two inches in a typical winter. The annual mean is in the upper fifties. Cobb, the nearest town, is under five miles off, so this is not deep backcountry.
The best months on file are the winter ones. Warm Springs Rec Area is the nearest camp, nearly thirteen miles. Do not step into the source; it will scald. With no owner listed, assume nothing about access.
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 Sulphur Creek.
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 east.
- Highest ground nearby
- 436 ft above the spring
- Within a quarter mile, to the east
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.
That's about 2½ times the US average of 65. It's higher than at 97% 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.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
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Overview Warm Springs Recreation Area is a day-use park located at Lake Sonoma, which is just a 45 minute drive north of Santa Rosa and a 2 hour trip from San Francisco. There is no overnight camping available at this facility World famous vineyards and a land rich in history surround the lake, where visitors enjoy boating, fishing and exploring the area's extensive trail network.Recreation The Woodland Ridge Nature Trail begins at the park and winds up the ridge, rewarding hikers with great...
Sulphur Creek is road-accessible, so you can bring more gear. The water runs hot, so extra hydration is key.
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