South River is a village on Highway 124 near Algonquin Park in the Almaguin Highlands region of Parry Sound District of Ontario, Canada. It is about halfway between North Bay and Huntsville or a 3-hour drive north from Toronto. South River has access to the Algonquin Park for canoeists at Kawawaymog. South River is home of Mikisew Provincial Park on the shores of Eagle Lake.