St. Lawrence River

The St. Lawrence River carries water from Lake Ontario northeast to the Gulf of St. Lawrence, linking the Great Lakes to the Atlantic Ocean and forming part of the Canada–United States border.

Great Lakes: A connected group of five large freshwater lakes on the Canada–United States border. Lake Ontario feeds the river, making the lakes its upstream freshwater source.
Port of Montreal: A major Canadian seaport on the St. Lawrence River in Montreal, Quebec. Its inland location connects ocean shipping with rail and road networks.
Jacques Cartier: A French explorer who led voyages to northeastern North America in the 1530s and 1540s. His 1535 voyage ascended the river and brought it into French maps.
Canada–United States Border: The international boundary separating Canada and the United States. Part of the river marks this boundary, especially between Ontario and New York.
Lake Ontario: The easternmost Great Lake, bordered by Ontario and New York. The river begins at Lake Ontario’s northeastern outlet near Kingston.
Port of Quebec: A Canadian seaport on the St. Lawrence River at Quebec City. The port handles cargo where the river narrows toward its estuary.
Samuel de Champlain: A French explorer and colonist who founded Quebec City in 1608. His settlement anchored French colonial activity along the river.
Great Lakes Water Quality Agreement: A binational agreement through which Canada and the United States coordinate protection of Great Lakes water quality. Pollution in the lakes can flow downstream into the St. Lawrence system.
St. Lawrence Seaway: A system of locks, canals, and channels that allows ocean-going ships to travel between the Atlantic and the Great Lakes. Locks and canals bypass rapids and waterfalls along the river’s shipping route.
St. Lawrence Hydroelectricity: Electricity generated by dams and power stations on the St. Lawrence River. The river’s flow powers major facilities, including the Moses–Saunders generating station.

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