Carlsbad Spring flows 76 degrees Fahrenheit from Lake County's volcanic terrain, positioned just 45 feet from Penson Court with convenient roadside access. Water rises 17.5 degrees above ambient temperature in a mild foothill climate receiving moderate winter precipitation.
The spring occupies a 2,140-foot elevation site where oak woodland transitions to mixed chaparral. Nearby Lake Sonoma creates a landscape of rolling terrain with seasonal water sources, and the surrounding wine country infuses the area with cultural history and human settlement patterns.
History of Carlsbad Spring
Lake County's geothermal springs reflect Quaternary volcanism and fault-controlled heat flow. This modest spring produced low TDS water (161 mg/L) typical of dilute systems, with calcium and magnesium concentrations suggesting basalt-hosted geothermal reservoirs.
Roadside parking makes this spring highly accessible year-round. Lake Sonoma Recreation Area lies 28 kilometers away for picnicking. Visit in spring for wildflower displays or autumn for comfortable temperatures among the surrounding vineyards and oak grasslands.|
Is Carlsbad Spring worth visiting?
Best for
- Easy day trips
- Overnight camping trips
Carlsbad Spring is well suited for easy day trips and overnight camping trips.
Annual Precip: 27.7 in
Annual Snow: 7.4 in
January
Air 45°F · Water 76°F · +31° contrast
December
Air 45°F · Water 76°F · +31° contrast
February
Air 47°F · Water 76°F · +30° contrast
January offers 30°F more contrast than August
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...
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Camping gear
Nearby camping at Warm Springs Rec Area
Trash bag
Pack out what you pack in
0 miles from Kelseyville, CA
USGS Quad: KELSEYVILLE 7.5 · PP 492: 54.0 · Circ 790: 47.0 · NOAA: 11.0 · AMS Map: SANTA ROSA
What is the water temperature at Carlsbad Spring?
Carlsbad Spring has a water temperature of 76°F (24°C). This is a warm thermal spring.
Where is Carlsbad Spring located?
Carlsbad Spring is located in Lake County, California at 2,140 feet elevation, near Kelseyville. Coordinates: 38.9160°N, 122.7990°W.
How do I get to Carlsbad Spring?
Carlsbad Spring has Roadside road access, with the nearest road being Penson Court (149 ft from the road).
Can I camp near Carlsbad Spring?
Yes, Warm Springs Rec Area is located nearby (17.4 miles away).
Is it safe to soak at Carlsbad Spring?
Carlsbad Spring 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 Carlsbad Spring crowded?
Carlsbad Spring is accessible from a paved road, making it easy to reach. Weekends and holidays may be busier — consider visiting on a weekday for a quieter experience.
What should I bring to Carlsbad Spring?
Essentials for Carlsbad Spring: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in.