Anderson Springs discharges at 108°F (42°C) in the volcanic terrain near Cobb, Lake County, where the thermal water runs 48 degrees above the surrounding air temperature.
The spring emerges at 1,729 feet elevation near Hot Springs Road, accessible roadside with minimal approach. Forested ridges and volcanic terrain characterize the landscape. The Clear Lake volcanic field—one of California's most geothermally active zones—underlies this entire region, creating widespread thermal phenomena.
History of Anderson Springs
Anderson Springs sits within the Clear Lake volcanic field, a zone of active magmatic and hydrothermal systems. The area's geothermal signature has attracted interest for over a century, with local development growing around thermal springs that continue to define the region's character.
The spring is immediately accessible from Hot Springs Road, making it a quick roadside stop. Any season works for visits, though late spring through early fall offers the most comfortable conditions. The nearby Warm Springs Recreation Area at Lake Sonoma provides additional day-use opportunities.
Is Anderson Springs worth visiting?
Best for
- Hot spring soaking
- Easy day trips
- Overnight camping trips
Anderson Springs offers an accessible hot spring experience — great for a day trip.
Annual Precip: 32.2 in
Annual Snow: 2.6 in
January
Air 47°F · Water 108°F · +61° contrast
December
Air 47°F · Water 108°F · +61° contrast
February
Air 48°F · Water 108°F · +60° contrast
January offers 29°F more contrast than July
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
USGS Quad: WHISPERING PINES 7.5 · PP 492: 63.0 · Circ 790: 48.0 · NOAA: 25.0 · AMS Map: SANTA ROSA
What is the water temperature at Anderson Springs?
Anderson Springs has a water temperature of 108°F (42°C). This is considered a hot spring, well above body temperature.
Where is Anderson Springs located?
Anderson Springs is located in Lake County, California at 1,729 feet elevation, near Cobb. Coordinates: 38.7730°N, 122.7050°W.
How do I get to Anderson Springs?
Anderson Springs has Roadside road access, with the nearest road being Hot Springs Road (100 ft from the road).
Can I camp near Anderson Springs?
Yes, Warm Springs Rec Area is located nearby (16.3 miles away).
Is it safe to soak at Anderson Springs?
Anderson 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 Anderson Springs crowded?
Anderson Springs 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 Anderson Springs?
Essentials for Anderson Springs: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in.