Unnamed Thermal Spring
Near Eldridge in Sonoma County, this 70-degree thermal spring flows at just 261 feet elevation with exceptional roadside access only 2.6 meters from your vehicle.
Standing at your car's edge, you can access this warm spring requiring virtually no walking distance. The surrounding landscape transitions from vineyards to oak woodlands typical of Sonoma's transition zone. The spring emerges clear and steadily in a small basin surrounded by native vegetation. Wine country estates and rural homes dot the nearby slopes.
Eldridge's thermal waters reflect the same geothermal processes active throughout the San Francisco Bay Area's coastal ranges. The region's geology, shaped by major faults and crustal heating, has supported human occupation for thousands of years. The modern wine industry built upon land that Native peoples valued for its natural resources and moderate climate.
This spring offers supreme convenience with near-total roadside access. It remains accessible year-round, though winter rains may affect road conditions in rare cases. Spring and autumn provide the most comfortable visiting weather. The short nature of the walk makes this suitable for visitors of all abilities and ages.
Is this spring worth visiting?
Best for
- Easy day trips
- Overnight camping trips
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