Topanga Canyon Boulevard

State Route 27, commonly known by its street name Topanga Canyon Boulevard (/təˈpæŋɡə/ ^ⓘ), is a state highway in the U.S. state of California that runs from the Pacific Coast Highway (California State Route 1) at Topanga State Beach near Pacific Palisades, through the Topanga Canyon in Topanga, and continuing through Woodland Hills, Canoga Park, West Hills, and Chatsworth to the Ronald Reagan Freeway (State Route 118).

As one of the only routes across the Santa Monica Mountains, SR 27 is heavily traveled by commuters from the western San Fernando Valley heading to Santa Monica or Interstate 10.