Woodstock was initiated through the efforts of Michael Lang , Artie Kornfeld , Joel Rosenman , and John P. Roberts . Roberts and Rosenman financed the project . Lang had some experience as a promoter , having co-organized the Miami Pop Festival on the East Coast the prior year , where an estimated 25,000 people attended the two-day event
Miami Pop Festival
Miami Pop Festival (May 1968)
Woodstock