This is a list of seasons of the Intermediate Intercollegiate Series. The Canadian Intercollegiate Athletic Union (CIAU Central) in Ontario and Quebec was founded in 1902. It had three levels of play - Senior, Intermediate, and Junior. The senior level had the top teams - usually University of Toronto, McGill University, and Queen's University. The intermediate level included the first teams of the other schools plus often the second teams from universities entered in the senior level.