<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> 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>
where does highway 1 start in southern california
where does highway 1 start in southern california
at Interstate 5 ( I - 5 ) near Dana Point in Orange County
at Interstate 5 ( I - 5 ) near Dana Point in Orange County