The Legends of Laurel Canyon Cass Elliot, The Mamas & the Papas, Joni Mitchell EYE ON L.A.

Laurel Canyon is a mountainous neighborhood in the Hollywood Hills region of the Santa Monica Mountains, within the Hollywood Hills West district of Los Angeles, California
By the 1960s, the neighborhood had become a local center for counterculture, and many prominent folk and rock musicians moved into the area, making it a nexus for musical collaboration.
By the late 1970s, criminal activity in the neighborhood, including distribution of drugs, was controlled by the Wonderland Gang (named for a Laurel Canyon thoroughfare),