"Eight Miles High" could have referred to the condition of the band and patrons when The Byrds headlined this two-night show. The band, acknowledged symbol of 60's psychedelia, was photographed in an oddly bucolic setting and was opened by The Wildflower. The concert also featured The Dutchman, a play by LeRoi Jones, part of the theatrical fare that Bill Graham liked to say "would have drawn about 12 people" if he hadn't headed the billing with rock bands.
The postcard was printed after the concert with the 2nd printing of the poster. It measures 4 5/8" x 8 1/8".
When the Avalon Ballroom and Bill Graham's Fillmore Auditorium began to hold weekly dance concerts, Wilson was called upon to design the posters. He created psychedelic posters from February 1966 to May 1967, when disputes over money severed his connection with Graham. Wilson pioneered the psychedelic rock poster. Intended for a particular audience, "one that was tuned in to the psychedelic experience," his art, and especially the exaggerated freehand lettering, emerged from Wilson's own involvement with that experience and the psychedelic art of light shows.