Los Guilicos Warm Springs

Sonoma County, California · Near Kenwood
38.3940°N, 122.5520°W · 340 ft
88°F 51°F air · Good soaking weather 340 ft Short Walk Camping nearby (20.6 mi)
Aerial view of the ground around Los Guilicos Warm Springs LiDAR bare-earth view of the same ground around Los Guilicos Warm 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.

Kenwood, in Sonoma County, is under two miles from Los Guilicos Warm Springs, where the water sits a little below body temperature. A 2003 USGS measurement shows moderate dissolved solids and nothing else was sampled. Ownership and access are both blank in the record, and no photo has been attached.

Location

A walk of about five hundred feet from the nearest road, unnamed in the record. This is low ground, a few hundred feet above sea level, with no snow and a fair bit of rain. Oak Shores Day Use Area is the nearest camping listed, some twenty miles distant. Land unit is not given, and designation is missing too.

Winter scores best here, and with no snow any season is possible. The water is warm enough to sit in and too cool to burn. Nothing says the public may enter. With a town this close, treat the ground as private until shown otherwise. The only chemistry on file is a dissolved-solids reading from 2003.

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 Los Guilicos Warm Springs.

Setting
Hillside
The spring sits on a steep slope that climbs to the northwest.
Highest ground nearby
221 ft above the spring
Within a quarter mile, to the northwest
Cross-section through the spring

A slice through the ground from northwest to southeast, about 0.6 miles end to end.

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

Heat Below
182 milliwatts per square meter of heat flow

That's about 3 times the US average of 65. It's higher than at 98% 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
49°
Jan
51°
Feb
53°
Mar
57°
Apr
62°
May
69°
Jun
71°
Jul
70°
Aug
69°
Sep
64°
Oct
55°
Nov
49°
Dec
Annual Precip: 26.5 in Annual Snow: 0.2 in
Best Time to Visit
December Air 49°F · Water 88°F · +40° contrast
January Air 49°F · Water 88°F · +39° contrast
February Air 51°F · Water 88°F · +37° contrast
December offers 23°F more contrast than July
Current Conditions
51°F
ESE 0.0 mph 98% Good soaking weather
Tuesday 87° Low 52° Sunny
Spring is +1° warmer
Wednesday 79° Low 50° Patchy Fog then Mostly Sunny 1% precip
Spring is +9° warmer
Thursday 83° Low 51° Areas Of Fog then Mostly Sunny
Spring is +5° warmer
Friday 87° Low 52° Areas Of Fog then Sunny
Spring is +1° warmer
Saturday 86° Low 52° Patchy Fog then Mostly Sunny
Spring is +2° warmer
Water Chemistry Sampled 2003-07-15

The water at Los Guilicos Warm Springs contains 641 mg/L total dissolved solids.

Higher mineral concentration for therapeutic soaking
Nearby Camping
Nearby Camping
Oak Shores Day Use Area (Ca) 20.6 mi away

Overview Nestled between Blue Ridge and Cedar Roughs east of Napa Valley, Lake Berryessa provides ample public recreation opportunities. Popular activities on and around the large, yet uncrowded lake include fishing, boating, water skiing, wake boarding, jet skiing, sailing, swimming, kayaking, canoeing, wildlife viewing, hiking, biking and picnicking. The Dufer Point Visitor Center offers year-round interpretive events and exhibits highlighting natural and cultural resources. Lake Berrye...

Reservable Yes
Reserve on Recreation.gov →
Temperature
88°F
Warm Hot Boiling
Water Temp 88°F (31°C)
Avg Air Temp 60°F
Above Ambient +28°F
Mild soaking conditions September
Access
Road Access Short Walk
Distance to Road 502 ft
Frequently Asked Questions
What is the water temperature at Los Guilicos Warm Springs?
Los Guilicos Warm Springs has a water temperature of 88°F (31°C). This is a warm thermal spring.
Where is Los Guilicos Warm Springs located?
Los Guilicos Warm Springs is located in Sonoma County, California at 340 feet elevation, near Kenwood. Coordinates: 38.3940°N, 122.5520°W.
How do I get to Los Guilicos Warm Springs?
Los Guilicos Warm Springs has Short Walk road access (502 ft from the road).
Can I camp near Los Guilicos Warm Springs?
Yes, Oak Shores Day Use Area (Ca) is located nearby (20.6 miles away).
What minerals are in the water at Los Guilicos Warm Springs?
Water chemistry analysis shows the presence of Total Dissolved Solids. Total dissolved solids measure 641 mg/L.
Sources: USGS NWIS