Country Joe McDonald and the Fish perform onstage at the Fantasy Fair and Magic Mountain Music Festival, which took place on June 11, 1967 at the Sidney B. Cushing Memorial Amphitheatre on Mount Tamalpais in Marin, California. The home movie footage has no sound. The band performs, sometimes the head of a festival-goer obscures part of the image. A red balloon rises through the fir trees. The crowd sits listening to the music.