Anderson Springs
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.
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
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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...