Unnamed Thermal Spring
This unnamed thermal spring flows at 95 degrees Fahrenheit in Lake County near Soda Bay at 1,321 feet elevation, requiring a 142-meter walk through terrain shaped by Clear Lake's volcanic field and complex geothermal systems.
The approach crosses rolling terrain in California's inner Coast Ranges where Clear Lake dominates the landscape. Water temperature creates comfortable soaking conditions without extreme thermal stress. The region experiences Mediterranean climate patterns with wet winters and dry summers, supporting distinct vegetation adapted to seasonal water availability.
The spring reflects thermal activity associated with Clear Lake's young volcanic field and underlying geothermal systems. Complex crustal structures channel heat from depth, creating scattered thermal features throughout the region. The Clear Lake volcanic field represents one of California's most active geothermal provinces.
Expect a 470-foot walk to reach the spring through accessible terrain. Water temperature permits comfortable extended soaking. Letts Lake Campground offers developed camping 35 kilometers away with full reservations. Best visited autumn through spring when lower air temperatures enhance soaking comfort. Summer heat can be intense.
Is this spring worth visiting?
Best for
- Warm-water soaking
- Overnight camping trips
Overview This location is available on a first-come, first-served basis only. Visitors are required to physically arrive at the campground to purchase and claim a site.Once on-site, you are able to pay for your campsite(s) by scanning a QR code using the Recreation.gov mobile app, and the Scan and Pay feature.In order to utilize Scan & Pay on site, you will need to first download the free Recreation.gov mobile app https://www.recreation.gov/mobile-app prior to your arrival as some remote area...