Held at Longshoreman's Hall, San Francisco, CA. Produced by Stewart Brand, Ken Kesey, and Bill Graham. Featured Ken Kesey & The Merry Pranksters, Big Brother & The Holding Company, Neal Cassady, the Grateful Dead, Allen Ginsberg, the Hell's Angels, and many more.

Held in in Golden Gate Park, San Francisco, CA. Produced by Michael Bowen and Allen Cohen. Creators of The San Francisco Oracle threw a big party for thousands of hippies on the date that LSD was first made illegal in California, inviting Ken Kesey & The Merry Pranksters, Janis Joplin, the Grateful Dead, and others. Retrospectively considered to have been a "warm up" event for the Human Be-In that happened on January 14, 1967.

Held in in Golden Gate Park, San Francisco, CA. Produced by Michael Bowen and Allen Cohen. Creators of The San Francisco Oracle threw an even bigger party for 20,000+ hippies, inviting Timothy Leary (who made his first public appearance in San Francisco), Richard Alpert (Ram Dass), Allen Ginsberg, Gary Snyder, Lawrence Ferlinghetti, Jerry Rubin, and others, including Owsley Stanley, who provided his newly illicit LSD for those in attendance. The Hells Angels worked as event security, while music was performed by Jefferson Airplane and the Grateful Dead.

Some reports state that hundreds of people experienced extreme trips lasting up to three days with many ending up in the hospital. Some estimates are that 5,000 or more doses were distributed, but Erowid believes the number of doses distributed up to and through June is less than one thousand, based on notes from Tim Scully who discussed this with "Bear" Owsley Stanley, the number was much lower than some reports. The BNDD Microgram Bulletin from November 1967 states "In early June, allegedly several thousand 'STP' tablets were distributed free at a "LOVE IN" in the San Francisco area. However, the contemporaneous reports from the FDA do not support the "several thousand" number which was published in November, six months after the events in question.

Held in White Lake, New York. Produced by Artie Kornfeld, Michael Lang, John Roberts, and Joel Rosenman. The infamously over-attended rock concert that drew around 500,000 hippies to listen to over thirty acts, including The Band, Joan Baez, Canned Heat, Creedence Clearwater Revival, Crosby, Stills, Nash & Young, the Grateful Dead, Arlo Guthrie, Jimi Hendrix, Janis Joplin, Jefferson Airplane, Ravi Shankar, and The Who.

Considered one of several watershed events in the counter cultural history of the time, this massive event in Connecticut drew people from all over the country. Officials attempted to stop it and most of the scheduled music bands failed to make it into the event. Psychedelics and cannabis were widely available.