State Route 12

California State Route 12
The 2,890-foot long Helen Madere Bridge spans the Sacramento River between Front Street in Rio Vista and SR 160. The 1944 bridge is well traveled, with lengthy delays resulting from bridge lift operations. 11/23/06, 09/05/10

Starting at SR 116 in Sebastopol, SR 12 is a major east-west route across Northern California. The state route travels east via Santa Rosa, Sonoma Valley (famous for its wineries like its more well-known cousin, Napa Valley), Napa, Fairfield / Suisun City, Rio Vista and Lodi. The highway ends when it meets SR 49 in the Gold Country at the town of San Andreas.

California State Route 12 Guides

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Page Updated Tuesday March 19, 2019.