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The 'Strait of Canso' (also 'Gut of Canso' or 'Canso Strait'), is a strait located in northeastern North America. It divides the Nova Scotia peninsula from Cape Breton Island.
It is a long thin channel approximately 27 kilometres long and averaging 3 kilometers wide (1 km at its narrowest). The strait connects the North Atlantic Ocean to the Northumberland Strait in the Gulf of St. Lawrence.
The strait is extremely deep (200+ feet) with two major communities at Port Hawkesbury on the eastern side facing Mulgrave on the western side, both ports. The strait is crossed by the Canso Causeway for vehicular and rail traffic, opened in 1955, although large ships may pass through the Canso Canal.