California State Route 121 (CA 121 or SR 121), also known as the Carneros Highway, is a state highway that runs through the wine country regions of Sonoma and Napa counties. The route travels north-south, connecting the San Francisco Bay Area with the central Napa Valley and areas further north.
California State Route 121 (CA 121 or SR 121), also known as the Carneros Highway, is a state highway that runs through the wine country regions of Sonoma and Napa counties. The route travels north-south, connecting the San Francisco Bay Area with the central Napa Valley and areas further north.
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