The St. Lawrence River (French: Fleuve Saint-Laurent, pronounced [flœv sɛ̃ lɔʁɑ̃]) is a large international river in the middle latitudes of North America connecting the Great Lakes to the North Atlantic Ocean.

Jul 17, 2021 · St. Lawrence River flowing past Montreal, Canada. The St. Lawrence River measures 1,197 kilometres, or 744 miles long. The river was named by explorer Jacques Cartier who sailed up the river on the Feast of St. Lawrence. The river was once a glacier-filled depression, which filled as the ice flow receded.

Jan 15, 2025 · St. Lawrence River, hydrographic system of east-central North America. It starts at the outflow of Lake Ontario and leads into the Atlantic Ocean in the extreme east of Canada, opening much of the interior of the North American continent.

The Saint Lawrence River and Seaway System is a large hydrographic system in east-central North America, crossing the interior of the continent and providing the primary drainage of the Great Lakes Basin. The "Great Lakes-St. Lawrence Seaway System" extends approximately 2,500 miles (4,000 kilometers).

Feb 7, 2006 · The St. Lawrence River is a grand river and estuary, which together with the Great Lakes forms a hydrographic system that penetrates 3,058 km into North America. The river proper, about 1,197 km long, issues from Lake Ontario, flows northeast past Montreal and Quebec City to the Gulf of St. Lawrence.

It is the third largest river in Canada. The river drains water from the Great Lakes into the Atlantic Ocean. It is more than three thousand kilometres long. The river meets the Atlantic Ocean in a big "estuary" or bay, the biggest in the world; this is called the Gulf of Saint Lawrence.

The St. Lawrence River drops 226 feet between Lake Ontario and Montreal, Canada. To allow vessels to pass through the river and in and out of the Great Lakes, the St. Lawrence Seaway, a massive American-Canadian navigational project, was begun in 1954 and completed in 1959.

Saint Lawrence River and Seaway, Hydrographic system of east-central North America. It connects the North River (source of the St. Louis River, in the U.S. state of Minnesota, which flows into Lake Superior ) with Cabot Strait, leading into the Atlantic Ocean in the extreme east of Canada, crossing the interior of the North American continent ...

The St. Lawrence River proper is a short stream. It is 740 miles (1,190 kilometers) long from the east end of Lake Ontario to Cape Gaspé. Here it empties into the 500-mile- (800-kilometer- ) long Gulf of St. Lawrence. The river forms 114 miles (183 kilometers) of the New York–Ontario border.

Flowing 750 miles northeast from Lake Ontario to the Atlantic Ocean, the St. Lawrence River shapes the fate of the peoples on both of its shores. The river, despite its difficult rapids, has long served as a vital transportation conduit for trade, migration, and exploration.