Los Guilicos Warm Springs

Sonoma County, California · Near Kenwood
38.3940°N, 122.5520°W · 340 ft
88°F 340 ft Short Walk Camping nearby (20.6 mi)

Los Guilicos Warm Springs emerges at 88°F in Sonoma County wine country, producing water 28 degrees above ambient in a gentle Mediterranean climate. Located near Kenwood at just 340 feet elevation, this warm spring has attracted visitors since the 19th century and sits in one of California's premier wine-growing regions.

Location

A short walk from the road through vineyards and oak savanna reaches Los Guilicos at 340 feet elevation near Kenwood. Warm water emerges into a natural pool surrounded by native oak and grassland typical of Sonoma County's transitional zone between coastal ranges and interior valleys. The 88°F discharge creates a comfortable thermal environment year-round in this mild climate.

refers to the terrain where thermal waters have been known since the 19th century. The 28-degree elevation above ambient (59.8°F) reflects moderate geothermal circulation in Sonoma County's geologically complex boundary zone. The warm waters attracted early spa development before modern conservation efforts established current protection."

History of Los Guilicos Warm Springs

Los Guilicos, meaning \little peaks\" or \"hills\" in Spanish

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
SSE 3.6 mph 98% Good soaking weather
Thursday 76° Low 47° Sunny
Spring is +12° warmer
Friday 80° Low 47° Sunny
Spring is +8° warmer
Saturday 83° Low 49° Sunny
Spring is +5° warmer
Sunday 85° Low 50° Sunny
Spring is +3° warmer
Monday 92° Low 52° Mostly Sunny
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
Where to Stay

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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 May
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.
Is it safe to soak at Los Guilicos Warm Springs?
Los Guilicos Warm Springs is generally safe for soaking at its recorded temperature. Access may be on private land or unconfirmed — verify current conditions before visiting. Always tell someone your plans before visiting remote hot springs.
Is Los Guilicos Warm Springs crowded?
Los Guilicos Warm Springs sees varying levels of visitors depending on the season and day of the week.
What should I bring to Los Guilicos Warm Springs?
Essentials for Los Guilicos Warm Springs: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in.
Sources: USGS NWIS