Spiers Springs

Lake County, California · Near Cobb
38.8380°N, 122.6530°W · 1,419 ft
79°F 1,419 ft Roadside Camping nearby (20.4 mi)

Spiers Springs flows at 79°F in the forested hills of Lake County near Cobb, situated in the geothermally active wine country thermal belt north of San Francisco.

Location

The spring emerges at 1,419 feet elevation in the Mayacamas Mountains, positioned just 62 feet from Big Canyon Road for easy access. The surrounding landscape features oak woodlands and coniferous forests with 26.8 inches of annual precipitation, creating green rolling terrain in one of California's premier wine-growing regions.

The roadside location near Big Canyon Road makes this spring one of Lake County's most accessible thermal features. The proximity to wine country, Lake Sonoma recreational areas, and the Warm Springs Recreation Area makes this a convenient addition to a regional visit. Access is straightforward year-round.

History of Spiers Springs

This spring lies within the geothermal belt extending from The Geysers southward through the North Coast Ranges, an area of significant volcanic and tectonic activity that produces numerous hot springs. The region's thermal characteristics have long made it distinctive in California's landscape.

Monthly Climate
48°
Jan
49°
Feb
51°
Mar
57°
Apr
63°
May
73°
Jun
78°
Jul
77°
Aug
72°
Sep
64°
Oct
53°
Nov
47°
Dec
Annual Precip: 26.8 in Annual Snow: 1.4 in
Best Time to Visit
December Air 47°F · Water 79°F · +32° contrast
January Air 48°F · Water 79°F · +31° contrast
February Air 49°F · Water 79°F · +30° contrast
December offers 31°F more contrast than July
Current Conditions
55°F
WSW 10.8 mph 91% Good soaking weather
Thursday 80° Low 57° Sunny
Friday 81° Low 57° Sunny
Saturday 85° Low 61° Sunny
Sunday 87° Low 62° Sunny
Monday 92° Low 66° Mostly Sunny
Where to Stay

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Nearby Camping
Warm Springs Rec Area 20.4 mi away

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...

Reservable Yes
Reserve on Recreation.gov →
Temperature
79°F
Warm Hot Boiling
Water Temp 79°F (26°C)
Avg Air Temp 61°F
Above Ambient +18°F
Mild soaking conditions May
Access
Road Access Roadside
Nearest Road Big Canyon Road
Distance to Road 204 ft
Frequently Asked Questions
What is the water temperature at Spiers Springs?
Spiers Springs has a water temperature of 79°F (26°C). This is a warm thermal spring.
Where is Spiers Springs located?
Spiers Springs is located in Lake County, California at 1,419 feet elevation, near Cobb. Coordinates: 38.8380°N, 122.6530°W.
How do I get to Spiers Springs?
Spiers Springs has Roadside road access, with the nearest road being Big Canyon Road (204 ft from the road).
Can I camp near Spiers Springs?
Yes, Warm Springs Rec Area is located nearby (20.4 miles away).
Is it safe to soak at Spiers Springs?
Spiers 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 Spiers Springs crowded?
Spiers 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 Spiers Springs?
Essentials for Spiers Springs: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in.