17x22" original textured thin stock paper printed before the event. Promoting the third and last Sky River festival held from Aug. 28 through Sept. 8  in Washougal, WA even though the poster states "The Exact Location Of Sky River Will Be Released August 27th - Listen To Your Radio." This 10 day event boasted over 30 bands, workshops, light shows, a circus and more w/daily attendance in excess of 10,000 on some days. Air Pirates cartoonist collective founder Dan O'Neill met Shary Flenniken at the media booth where she was producing a Sky River daily newsletter, as well as Bobby London, Ted Richards and Seattle-based cartoonist Gary Hallgren. Moderate handling wear w/creases to edges and corner bends as well as red and black ink markings at top left corner on verso visible through front. VG. An impressive collectible since this marks the first gathering of the Air Pirates who officially formed in 1971 and created two issues of the underground comic "Air Pirates Funnies" leading to the famous lawsuit by Walt Disney Productions.