A poster for the 1965 Mariposa Folk Festival featuring Joni Anderson, soon to be know throughout the world by her married name, Joni Mitchell. This is the earliest known concert poster to feature Mitchell, and the only one with her maiden name (she married folk singer Chuck Mitchell the year of this festival, 1965.) This Ontario, Canada festival also featured Phil Ochs, Gordon Lightfoot, Ian & Sylvia, John Hammond, Son House and many others–but it is Joni Anderson's inclusion that makes this so special. 15 3/4" x 27", in excellent condition, with some handling creases. The only know example of this historic poster.