<Table> <Tr> <Td> ← I - 980 </Td> <Td> </Td> <Td> SR 2 → </Td> </Tr> </Table> <Tr> <Td> ← I - 980 </Td> <Td> </Td> <Td> SR 2 → </Td> </Tr> <P> State Route 1 (SR 1) is a major north--south state highway that runs along most of the Pacific coastline of the U.S. state of California . At a total of just over 655.8 miles (1,055.4 km), it is the longest state route in California . SR 1 has several portions designated as either Pacific Coast Highway (PCH), Cabrillo Highway, Shoreline Highway, or Coast Highway . Its southern terminus is at Interstate 5 (I - 5) near Dana Point in Orange County and its northern terminus is at U.S. Route 101 (US 101) near Leggett in Mendocino County . SR 1 also at times runs concurrently with US 101, most notably through a 54 - mile (87 km) stretch in Ventura and Santa Barbara counties, and across the Golden Gate Bridge . </P> <P> The highway is designated as an All - American Road . In addition to providing a scenic route to numerous attractions along the coast, the route also serves as a major thoroughfare in the Greater Los Angeles Area, the San Francisco Bay Area, and several other coastal urban areas . </P>

Where does highway 1 start in southern california