Summer of Love in the context of "City and County of San Francisco, California"

San Francisco, officially the City and County of San Francisco, is a commercial, financial, and cultural center of Northern California. With an estimated population of 827,526 residents as of 2024, San Francisco proper is the fourth-most populous city in the U.S. state of California and the 17th-most populous in the United States. Among U.S. cities proper with over 300,000 residents, San Francisco is ranked second by population density, first by per capita income, and sixth by aggregate income as of 2023. Depending on how its borders are defined, the broader San Francisco metropolitan area or San Francisco Bay Area is home to 4.6–9.2 million residents. In 2024, the U.S. Census Bureau reported an estimated population of 4,648,486 for the city's metropolitan statistical area (13th-largest in the U.S.) and 9,164,058 residents for the larger combined statistical area (5th-largest).

Prior to European settlement, the modern city proper was inhabited by the Yelamu Ohlone. On June 29, 1776, settlers from New Spain established the Presidio of San Francisco at the Golden Gate, and the Mission San Francisco de Asís a few miles away, both named for Francis of Assisi. The California gold rush of 1849 brought rapid growth, making it the largest city on the West Coast at the time. In 1856, San Francisco became a consolidated city-county. After three-quarters of the city was destroyed by the 1906 earthquake and fire, it was quickly rebuilt, hosting the Panama–Pacific International Exposition nine years later. In World War II, it was a major port of embarkation for naval service members shipping out to the Pacific Theater. After the war, the confluence of returning servicemen, significant immigration, liberalizing attitudes, the rise of the beatnik and hippie countercultures, the sexual revolution, opposition to U.S. involvement in the Vietnam War, and other factors led to the Summer of Love and the gay rights movement, cementing San Francisco as a center of liberal activism.

Flower child originated as a synonym for hippie, especially among the idealistic young people who gathered in San Francisco and the surrounding area during the Summer of Love in 1967. It was the custom of "flower children" to wear and distribute flowers or floral-themed decorations to symbolize ideals of universal belonging, peace, and love. The mass media picked up on the term and used it to refer in a broad sense to any hippie. Flower children were also associated with the flower power political movement, which originated in ideas written by Allen Ginsberg in 1965.

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 Trip is a 1967 American psychedelic film released by American International Pictures, directed by Roger Corman and written by Jack Nicholson. It was shot on location in and around Los Angeles, including on top of Kirkwood in Laurel Canyon, the Hollywood Hills, and near Big Sur, California, over three weeks in March and April 1967. Peter Fonda stars as a young man who experiences his first LSD trip.

Released during the Summer of Love, The Trip was very popular, particularly with members of the era’s counterculture. It became one of AIP’s most successful releases and was important in the later development of an even larger cultural touchstone in Easy Rider, which involved many of the same personnel and appealed to the same young demographic.