Original 1st printing 8&1/2 x 11" concert/event flyer for the 1/14/1967 Gathering of the Tribes/Human Be-In, held at the Polo Grounds in San Francisco's Golden Gate Park.
This version of the flyer lists appearances by counterculture heroes Lenore Kandel, Timothy Leary, Michael McClure, Allen Ginsberg, Gary Snyder, Richard Alpert, Jerry Rubin, Dick Gregory, Lawrence Ferlinghetti, "all SF rock bands" (which included Jefferson Airplane, Quicksilver Messenger Service, the Charlatans, the Grateful Dead, Country Joe & the Fish, Big Brother & the Holding Company (with Janis Joplin) and more).
Art by Michael Bowen, image is featured in the Art of Rock on page 197 (plate 2.216).
Medium-thin flat stock flyer is in good to very good (B to B/B+) condition; a series of tiny staple/pin holes in all four corners, a quartet of small brown "drip stains" in the left margin, a few soft handling dings, a tiny thin pen scratch line in the upper right corner and a touch of toning, otherwise fine.
Very charming example of this classic 1967 event flyer from the Haight-Ashbury scene.