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Saint Lawrence River

The Saint Lawrence River is the largest river in Canada and one of the largest in the world. It drains more than a half million square miles, including the Great Lakes and southeastern Canada. The river begins at the northeast end of Lake Ontario and flows to the northeast until it enters the Gulf of Saint Lawrence. Although in its upper reaches, it forms the international border between Canada and the U.S., dividing Ontario from New York, most of its course is through the province of Quebec. Its width is generally around a mile, but at times it broadens to form "lakes," of which the two best known are [pq:lacstlou] near Montreal and [pq:lacstpie] near Trois Rivieres.