Sulphur Spring
Sulphur Spring emerges at 75°F near San Francisco Bay, reaching temperatures 14.4 degrees warmer than the mild East Bay climate in a nearly roadside-accessible location.
Just 33 meters from Lonoak Road, this spring flows at minimal elevation in the low coastal hills of Contra Costa County near Waldon, offering easy access to thermal water in an urban-fringe landscape.
Named for its characteristic sulfur minerals, the spring flows in a Mediterranean climate zone with minimal precipitation and virtually no winter snow, typical of the Bay Area's mild temperate conditions.
Roadside parking and immediate access make this an excellent quick visit. Visit during cooler months to avoid peak Bay Area heat. Aquatic Park Cove on San Francisco's waterfront offers nearby accommodations.
Is Sulphur Spring worth visiting?
Best for
- Easy day trips
- Overnight camping trips
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Overview Aquatic Park Cove is a vibrantly urban harbor that mimics a natural anchorage and is located on the Pacific shores of one of America's great West Coast cities. San Francisco Maritime National Historical Park's Aquatic Park Cove is the small craft gateway to San Francisco. Vessels entering Aquatic Park Cove are instructed to contact the Park's permit officer on VHF marine radio channel 83A (157.175Mhz) using the call sign "Aquatic Park NPS" followed by transmission of the vessel'...