This poster is from a four day concert event held at The Avalon Ballroom by Family Dog Productions in San Francisco. The concerts were July 20-23, 1967. The shows featured performances by Big Brother and the Holding Company, Mt. Rushmore, Canned Heat, and Mother Earth. The artwork was created by Dennis Nolan. The size is approximately 14 inches x 20 inches and is printed in black ink on a brown/bronze background. This is a first printing and was printed before the concert. The poster is used with tack holes on either side and in the corners; the bottom right corner is bent and creased on the tip.