Napa Rock Soda Spring, Phillips Sod
Napa Rock Soda Spring (also called Phillips Soda Spring) emerges at 78°F (26°C) in the mountains above Napa Valley with carbonated, slightly warm water that reflects both geothermal influence and mineral-enriched groundwater circulation through wine country geology.
The spring flows through forested terrain at 1,230 feet elevation in the hills east of Napa Valley, requiring a moderate walk (537 meters) from the nearest road through typical North Coast Range vegetation. The landscape consists of oak woodland mixed with Douglas fir and chaparral, with views toward Lake Berryessa and surrounding wine-country ridges.
The name 'Phillips Soda' or 'Napa Rock Soda Spring' reflects the carbonated water chemistry, indicating CO2-enriched groundwater circulation. The spring lies in the geologically complex foothills where wine country transitions to wilder terrain—a landscape shaped by both tectonic activity and volcanic history.
Reach the spring via a moderate forest walk from the nearest road. Closest public facilities include Oak Shores Day Use Area on Lake Berryessa (5 kilometers away), which offers parking and amenities. Visit fall through spring for comfortable hiking conditions. The carbonated spring water has modest warming above ambient temperature, suitable for a refreshing visit rather than hot soaking.
Is Napa Rock Soda Spring, Phillips Sod worth visiting?
Best for
- Overnight camping trips
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...