California State Route 29
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| Route information | ||||
| Defined by | ||||
| Maintained by Caltrans | ||||
| Length: | 105.648 mi (170.024 km) | |||
| Existed: | 1934 – present | |||
| Major junctions | ||||
| South end: |
 I-80 in Vallejo
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 SR 12 near Napa SR 128 in Calistoga SR 53 near Clearlake SR 175 near Lakeport
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| North end: |
 SR 20 at Upper Lake
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| Highway system | ||||
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State Route 29 (SR 29) is a state highway in the U.S. state of California that travels from Interstate 80 in Vallejo north to State Route 20 in Upper Lake. It serves as the primary road through the Napa Valley, providing access to the Clear Lake region to the north and the rest of the San Francisco Bay Area to the south.
This route is part of the California Freeway and Expressway System south of the intersection of Oak Knoll Avenue (approximately 1 mile north of the Napa city limits), and is eligible for the State Scenic Highway System. However, it is not a scenic highway as defined by Caltrans.
SR 29 begins at Interstate 80 (I-80) just north of the Carquinez Bridge in Vallejo. After running through the downtown area of Vallejo, it travels as a four-lane expressway (on some segments, five) through American Canyon to Napa. It then briefly becomes a freeway as it passes through Napa.
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