The Mississagi Strait is a narrow strait or channel in Lake Huron, connecting the North Channel to the main water body. The strait separates Manitoulin Island from Cockburn Island. Simplified diagram A strait is a narrow channel of water that connects two larger bodies of water, and thus lies between two land masses. ... In physical geography, a channel is the physical confine of a river or slough, consisting of a bed and banks. ... Lake Huron and the other Great Lakes Lake Huron, bounded on the west by Michigan and on the east by Ontario, is one of the five Great Lakes of North America. ... Manitoulin Island is the worlds largest freshwater lake island, with an area of 2,766 square kilometres (1068 square miles). ... Cockburn Island is an island in the Canadian province of Ontario, located in the Manitoulin District. ...