Original 1st printing (Bindweed Press credit, yellow background) 13&7/8 x 19&7/8" conference/event poster for the Sierra Club's 10th Biennial Wilderness Conference held at the Hilton Hotel in San Francisco, CA from 4/7-9/1967.

 Art by Stanley Mouse and Alton Kelley, image (silver-background Berkeley Bonaparte 2nd printing) is featured in the Art of Rock book on page 239 (plate 2.365).

 Medium flat vellum stock poster is in good to very good (B to B/B+) condition; there are tack holes in all four corners, along with a light to moderate amount of edge toning (with a few tiny pin-prick "chips" scattered along the top margin), a couple of thin horizontal stress bends hiding within the image area, a couple of tiny pin-prick indentations, light handling dings and hairline scratches hiding within the image area, a 1/2" nip out of the upper left margin, a couple of soft/creased corner tips and a pair of small rubber-stamps (original owner's name) on the reverse side... definitely not mint, but still a fairly decent-looking example overall.

 ICONIC 1st printing early-'67 Mouse/Kelley poster, it was later reprinted by Berkeley Bonaparte, San Francisco Poster Company and most recently by Mouse himself.