Horseshoe Spring produces 108°F water in Lake County near Soda Bay at 1,321 feet elevation, running 47°F above ambient temperature. Located in volcanic terrain with scattered geothermal activity, the spring sits 640 feet from the nearest road, requiring a brief walk to access.
The spring emerges from the volcanic landscape of Lake County at the foothills elevation where thermal activity persists. Mixed forests and rocky terrain frame the approach, with the spring creating its own microclimate in the foothill environment. The setting reflects the volcanic heritage of this geologically active region.
History of Horseshoe Spring
Horseshoe Spring draws heat from volcanic systems underlying Lake County. The thermal feature sits in an area known for scattered geothermal activity related to deeper crustal heat sources. The spring represents part of the regional geothermal pattern that has attracted settlement and development.
The spring sits 640 feet from the nearest road, accessible via a brief walk. The foothill elevation experiences mild temperatures averaging 61°F with moderate precipitation around 27 inches annually and occasional snow around 4 inches. Access is relatively easy year-round given the moderate elevation and climate.
Is Horseshoe Spring worth visiting?
Best for
- Hot spring soaking
- Overnight camping trips
Horseshoe Spring is well suited for hot spring soaking and overnight camping trips.
Annual Precip: 26.7 in
Annual Snow: 4.5 in
December
Air 46°F · Water 108°F · +62° contrast
January
Air 47°F · Water 108°F · +61° contrast
February
Air 48°F · Water 108°F · +60° contrast
December offers 32°F more contrast than August
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
3 miles from Soda Bay, CA
USGS Quad: (CLEARLAKE HIGHLANDS 7.5) · Circ 790: 47.0 · NOAA: 2.0 · AMS Map: SANTA ROSA
What is the water temperature at Horseshoe Spring?
Horseshoe Spring has a water temperature of 108°F (42°C). This is considered a hot spring, well above body temperature.
Where is Horseshoe Spring located?
Horseshoe Spring is located in Lake County, California at 1,321 feet elevation, near Soda Bay. Coordinates: 38.9940°N, 122.7420°W.
How do I get to Horseshoe Spring?
Horseshoe Spring has Short Walk road access (0.1 mi from the road).
Can I camp near Horseshoe Spring?
Yes, Letts Lake Campground is located nearby (21.4 miles away).
Is it safe to soak at Horseshoe Spring?
Horseshoe 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 Horseshoe Spring crowded?
Horseshoe Spring sees varying levels of visitors depending on the season and day of the week.
What should I bring to Horseshoe Spring?
Essentials for Horseshoe Spring: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in.