The Mantra-Rock Dance (poster pictured), called the "ultimate high" of the hippie era, took place in San Francisco, featuring Swami Bhaktivedanta, Janis Joplin, the Grateful Dead, and Allen Ginsberg.

The Mantra-Rock Dance was a counterculture music event held on January 29, 1967, at the Avalon Ballroom in San Francisco. It was organized by followers of the International Society for Krishna Consciousness (ISKCON) as an opportunity for its founder, A. C. Bhaktivedanta Swami Prabhupada, to address a wider public. It was also a promotional and fundraising effort for their first center on the West Coast of the United States.

A hippie, also spelled hippy, especially in British English, is someone associated with the counterculture of the mid-1960s to early 1970s, originally a youth movement that began in the United States and spread to different countries around the world. The word hippie came from hipster and was used to describe beatniks who moved into New York City's Greenwich Village, San Francisco's Haight-Ashbury district, and Chicago's Old Town community. The term hippie was used in print by San Francisco writer Michael Fallon, helping popularize use of the term in the media, although the tag was seen elsewhere earlier.

San Francisco, officially the City and County of San Francisco, is a commercial, financial, and cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the fourth-most populous city in the U.S. state of California and the 17th-most populous in the United States. San Francisco has a land area of 46.9 square miles at the upper end of the San Francisco Peninsula and is the fifth-most densely populated U.S. county. Among U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2023. San Francisco anchors the 13th-most populous metropolitan statistical area in the U.S., with almost 4.6 million residents in 2023. The larger San Jose–San Francisco–Oakland combined statistical area, the fifth-largest urban region in the U.S., had a 2023 estimated population of over nine million.