The Georgian Bay league played an interlocking schedule with the five teams of the Niagara District Intermediate A Hockey League—the Georgetown Raiders, the Dundas Merchants, the Thorold Athletics, Port Colborne and Fort Erie. The Niagara league was founded in 1964. In 1979-80 Georgetown and Dundas joined the Georgian Bay league, which also took in the Orillia Terriers and the Barrie Flyers from the OHA Senior A Hockey League. Dundas finished first in the standings and beat third-place Georgetown 3-1 in a best-of-five playoff final. Collingwood was second, Orillia was fourth, Barrie was fifth, Port Elgin dropped to sixth and Owen Sound finished seventh.