The KFRC Fantasy Fair and Magic Mountain Music Festival was an event held June 10 and 11, 1967, at the 4,000-seat Sidney B. Cushing Memorial Amphitheatre high on the south face of Mount Tamalpais in Marin County, California.

[6] KFRC 610, the RKO Bill Drake "Boss Radio" Top 40 AM station in San Francisco, had significant influence in the music industry among both counterculture and commercial acts.

Canned Heat, Dionne Warwick, Every Mother's Son, The Merry-Go-Round, The Mojo Men, P. F. Sloan, The Seeds, Country Joe and the Fish, Captain Beefheart, The Byrds with Hugh Masekela on trumpet, Tim Buckley, The Sparrows, The Grass Roots, The Loading Zone, The 5th Dimension and Jefferson Airplane were among the performers who appeared.

"- Jorma Kaukonen (Jefferson Airplane)[8][9]After waiting hours[9] for a ride up the mountain from embarkation points at the Marin County Civic Center, Mill Valley and other locations, attendees were greeted by a giant Buddha balloon when they arrived at the amphitheater.

[18][19][20] Reminiscent of their role at the Human Be-In the previous January in Golden Gate Park, members of the Hells Angels motorcycle club pitched in peacefully to help find lost children and to ferry musicians and others up and down the mountain's winding road.

[2][18][21][22][23][24][25] To some commentators, the festival represented a sea change in musical preferences among young Bay Area radio listeners as the hippie culture fully arose in mid-1967.