File:Dock at Ferndale Resort in Soda Bay - With morning fog (5801164875).jpg — cc by-sa 2.0
Big Soda Spring bubbles forth at 90 degrees Fahrenheit near Soda Bay in Lake County, suggesting carbonated or mineral-rich water typical of California's volcanic mineral springs.
The spring sits 74 feet from Willow Road at 1,321 feet elevation, emerging in the volcanic landscape surrounding Clear Lake. The area receives nearly 26 inches of annual precipitation but only about 5 inches of snow, creating a relatively mild climate where the warm spring water remains year-round accessible.
History of Big Soda Spring
The spring's name suggests soda springs where carbon dioxide-rich groundwater creates distinctive mineral deposits. The location sits within the geologically active Clear Lake region, where volcanic activity has driven mineralization and thermal feature development throughout the landscape.
Roadside access via Willow Road provides straightforward visitation near Soda Bay. The modest temperature and nearby development make this a lower-key thermal feature compared to hotter springs in the region. Letts Lake Campground, 33.7 kilometers away, offers first-come, first-served camping and swimming.
Is Big Soda Spring worth visiting?
Best for
- Warm-water soaking
- Easy day trips
- Overnight camping trips
Big Soda Spring is well suited for warm-water soaking and easy day trips.
Annual Precip: 25.9 in
Annual Snow: 4.8 in
December
Air 47°F · Water 90°F · +44° contrast
January
Air 47°F · Water 90°F · +43° contrast
February
Air 49°F · Water 90°F · +41° contrast
December offers 32°F more contrast than July
The main feature of the area is a 35-acre lake for non-motorized vessels, trout fishing and swimming. A one-mile trail leads along the lake shore. There are accessible restrooms and a popular fully-accessible fishing pier.
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Camping gear
Nearby camping at Letts Lake Campground
Trash bag
Pack out what you pack in
0 miles from Soda Bay, CA
USGS Quad: LUCERNE 7.5 · PP 492: 55.0 · Circ 790: 47.0 · NOAA: 16.0 · AMS Map: UKIAH
What is the water temperature at Big Soda Spring?
Big Soda Spring has a water temperature of 90°F (32°C). This is a warm thermal spring.
Where is Big Soda Spring located?
Big Soda Spring is located in Lake County, California at 1,321 feet elevation, near Soda Bay. Coordinates: 39.0060°N, 122.7870°W.
How do I get to Big Soda Spring?
Big Soda Spring has Roadside road access, with the nearest road being Willow Road (241 ft from the road).
Can I camp near Big Soda Spring?
Yes, Letts Lake Campground is located nearby (20.9 miles away).
Is it safe to soak at Big Soda Spring?
Big Soda 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 Big Soda Spring crowded?
Big Soda 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 Big Soda Spring?
Essentials for Big Soda Spring: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in.