Along with hockey, Dandurand and his partners were heavily involved with horse racing. In 1932, they bought Blue Bonnets Raceway in Montreal. They owned 17 tracks in Quebec, Ontario, New York, Ohio, Delaware, Illinois, Utah, and Louisiana at the time of Cattarinich's death in 1938. Dandurand was also a boxing and wrestling promoter in Montreal and a director of the Montreal Royals baseball team.