The Human Be-In, a countercultural event forming a prelude to the Summer of Love, was held in San Francisco's Golden Gate Park.

The Human Be-In was an event held in San Francisco's Golden Gate Park Polo Fields on January 14, 1967. It was a prelude to San Francisco's Summer of Love, which made the Haight-Ashbury district a symbol of American counterculture and introduced the word "psychedelic" to suburbia.

The counterculture of the 1960s was an anti-establishment cultural phenomenon and political movement that developed in the Western world during the mid-20th century. It began in the mid-1960s, and continued through the early 1970s. It is often synonymous with cultural liberalism and with the various social changes of the decade. The effects of the movement have been ongoing to the present day. The aggregate movement gained momentum as the civil rights movement in the United States had made significant progress, such as the Voting Rights Act of 1965, and with the intensification of the Vietnam War that same year, it became revolutionary to some. As the movement progressed, widespread social tensions also developed concerning other issues, and tended to flow along generational lines regarding respect for the individual, human sexuality, women's rights, traditional modes of authority, rights of people of color, end of racial segregation, experimentation with psychoactive drugs, and differing interpretations of the American Dream. Many key movements related to these issues were born or advanced within the counterculture of the 1960s.

The Summer of Love was a major social phenomenon that occurred in San Francisco during the summer of 1967. As many as 100,000 people, mostly young people, hippies, beatniks, and 1960s counterculture figures, converged in San Francisco's Haight-Ashbury district and Golden Gate Park.

Golden Gate Park is an urban park between the Richmond and Sunset districts on the West Side of San Francisco, California, United States. It is the largest urban park in the city, containing 1,017 acres (412 ha), and the third-most visited urban park in the United States, with an estimated 24 million visitors annually.