Zim Zim Spring
Zim Zim Spring flows at 70 degrees Fahrenheit on California's Knoxville Wildlife Area in Napa County, a state-protected location that balances thermal features with wildlife habitat conservation. The spring rises just 7.6 degrees above ambient temperature in a Mediterranean climate.
The spring occupies protected terrain 162 meters from Knoxville Road, accessed through state conservation land managed by California Fish and Wildlife. Rolling coastal mountains and oak woodlands frame the approach in terrain where annual precipitation exceeds 20 inches. The moderate water temperature creates comfortable soaking without extreme thermal stress.
Zim Zim Spring's modest heat reflects shallow geothermal circulation in Napa County's complex basement rocks. The Knoxville Wildlife Area designation ensures long-term protection while permitting compatible public access. This spring exemplifies California's approach to managing thermal resources within habitat conservation frameworks.
Access requires a short walk through designated trails on wildlife area land. Obtain current access information from California Fish and Wildlife before visiting. The nearby Lake Berryessa recreation area offers day-use facilities 22 kilometers away. Respect wildlife habitat; stay on designated paths.
Is Zim Zim Spring 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...