The Watkins Glen outdoor summer jam was held outside of Watkins Glen, New York with The Allman Brothers Band, The Grateful Dead and The Band. Over 600,000 rock fans attended. Many historians claimed the event was the largest gathering of people in the history of the United States. 150,000 tickets were sold for $10 each, but for all the other people it was a free concert. The crowd was so huge that a large part of the audience was not able to see the stage.