The Ventura Freeway is a freeway in southern California running from Ventura to Pasadena. It is the principal east-west route through Ventura County and in the southern San Fernando Valley in Los Angeles County. From Ventura to its intersection with the Hollywood Freeway in the southeastern San Fernando Valley in Los Angeles (the Hollywood Split), it is signed as U.S. Route 101 which was built in the early 1960s. East of the Hollywood Freeway intersection, it is signed as State Route 134 which was built by 1971.
Prior to the construction of a new alignment in 1971, the portion east of the Hollywood Freeway was known as the Colorado Freeway in reference to nearby Colorado Boulevard, a historic thoroughfare in Pasadena and northeastern Los Angeles.
