Tolenas Springs
Tolenas Springs emerges at a mild 68°F in Solano County near Fairfield, barely exceeding ambient temperature by 7.9°F, representing the lower thermal threshold for geothermal features.
Situated at 721 feet elevation in the Coast Ranges foothills, the spring lies 943 meters from the nearest road requiring a short walk through rolling grasslands and oak-studded slopes between Napa Valley and Clear Lake basin.
This barely-thermal feature likely owes its slight warmth to shallow geothermal gradients rather than deep crustal circulation, representing a transition between natural springs and purely ambient groundwater in California's inner coast region.
Access requires a short walk approach. Oak Shores Day Use Area (32 km away) at Lake Berryessa offers recreation including fishing, boating, water skiing, and interpretive programs, though no overnight camping.
Is Tolenas Springs worth visiting?
Best for
- Overnight camping trips
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Overview Nestled between Blue Ridge and Cedar Roughs east of Napa Valley, Lake Berryessa provides ample public recreation opportunities. Popular activities on and around the large, yet uncrowded lake include fishing, boating, water skiing, wake boarding, jet skiing, sailing, swimming, kayaking, canoeing, wildlife viewing, hiking, biking and picnicking. The Dufer Point Visitor Center offers year-round interpretive events and exhibits highlighting natural and cultural resources. Lake Berrye...