The route from San Simeon to Carmel ( connecting with existing county highways at each end ) was one of two sections designated as SR 1 . It and Route 60 were intended as links in a continuous coastal roadway from Oregon to Mexico , A large expansion of the state highway system in 1933 resulted in Route 56 being extended in both directions . To the south , a second section was added , beginning at Pismo Beach on US 101 ( Route 2 ) and heading south through Guadalupe and Lompoc to rejoin US 101 at a junction called Los Cruces ( sic ) , just north of Gaviota Pass . ( A short piece near Orcutt and Los Alamos had been part of Route 2 , which originally followed present SR 135 from Los Alamos to Santa Maria . ) To the north , Route 56 was continued along the coast from Carmel through Santa Cruz to San Francisco . Several discontinuous pieces were added north of San Francisco , one from Route 1 ( US 101 ) north of the Golden Gate to the county line near Valley Ford , another from the Russian River near Jenner ( where the new Route 104 ended ) to Westport , and a third from Ferndale to Route 1 near Fernbridge . Except for the gaps in Route 56 north of San Francisco , these additions completed the coastal highway , with other sections formed by Routes 1 , 2 , and 71 . The section of SR 1 from Santa Monica to Oxnard , via Malibu , went out to contract in 1925 as " Coast Boulevard " , but was designated " Theodore Roosevelt Highway " when it was dedicated in 1929 . Before the completion of its present alignment in 1937 , a narrow , winding , steep road known as Pedro Mountain Road connected Montara with Pacifica . That highway was completed in 1914 and provided competition to the Ocean Shore Railroad , which operated between San Francisco and Tunitas Creek from 1907 to 1920 . SR 1 also used to run along the coast between Pacifica and Daly City , but this segment was damaged and rendered unusable after a 5.3 magnitude earthquake on March 22 , 1957 . A small stub remains near Thornton Beach
a 5.3 magnitude earthquake
1957 San Francisco earthquake
California State Route 1