Napa Rock Soda Spring, Phillips Sod
The orange dot marks the spring, in a frame about three quarters of a mile wide.
Napa Rock Soda Spring, also filed as Phillips Sod, a name cut short in the record, is a warm mineral spring in the Napa County hills about ten miles from Yountville. The water runs in the high seventies, tepid. Neither owner nor access status is on file.
The nearest road, unnamed on file, is about a third of a mile off, and the spring sits a bit over twelve hundred feet up. Rain is moderate, snow absent. Camping on file is at Oak Shores Day Use Area, a few miles away.
December to February are the months on record. No fee is noted. Ownership is unknown, so confirm what is there before you go. The water is tepid.
USGS hasn't flown a detailed laser scan here yet, so this view comes from aerial photos and older elevation data.
- Setting
- Hillside
- The spring sits on a steep slope that climbs to the north.
- Highest ground nearby
- 230 ft above the spring
- Within a quarter mile, to the north
A slice through the ground from west to east, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about twice the US average of 65. It's higher than at 80% of the springs on this site.
Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
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...
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