The Yountville Hills are a mountain range in Napa County,

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

on the northwest side of the town of

Yountville Yountville ( or ) is a city in Napa County, in the Wine Country of California, United States. Located in the North Bay region of the Bay Area, the population was 3,436 at the 2020 census. Almost a third of the town's population lives at the Ve ...

. The

West Napa Fault The West Napa Fault is a long geologic fault in Napa County, in the North Bay (San Francisco Bay Area), North Bay region of the San Francisco Bay Area in northern California. It is believed to be the northern extension of the Calaveras Fault in th ...

extends into the Yountville Hills, as mapped in 2005.
Mapping of the West Napa Fault Zone...

References

Mountain ranges of Napa County, California Hills of California Napa Valley Yountville, California California Coast Ranges Mountain ranges of Northern California {{NapaCountyCA-geo-stub