Festival Express was unique among rock festivals - rather than being held in one location, it was staged in three - Canadian cities Toronto, Winnipeg and Calgary during the summer of 1970. Montreal was initially to have been the fourth city, but this concert was canceled as the date would have coincided with St. Jean Baptiste Day, and the city felt it couldn’t provide adequate security. The idea was that rather than flying in to each city, the musicians would travel by chartered Canadian National Railways train, with the hope of fostering an atmosphere of musical creativity and closeness between the performers. The train rides between cities ultimately became a combination of non-stop jam sessions and partying, fueled by excess alcohol. Among the most memorable scenes depicting these informal jam sessions is a drunken jam featuring The Band's Rick Danko, the Grateful Dead's Jerry Garcia and Bob Weir, and Janis Joplin.  en.wikipedia.org