The KFRC Fantasy Fair and Magic Mountain Music Festival was an event held June 10 and 11th, 1967 at the 4,000 seat Sidney B. Cushing Memorial Amphitheatre high on the south face of Mount Tamalpais in Marin County, California. At least 36,000 people attended the two-day concert and fair that was the first of a series of San Francisco area cultural events known as the Summer of Love.