The Saint Lawrence - Niagara-Detroit-Saint Clair-Saint Marys-Saint Louis River is 1,900 miles (3,058 km) long. It has an average discharge of 10,100 m³/s and a drainage area of 1,030,000 km². It flows into the Gulf of Saint Lawrence. The countries within its drainage basin are: Canada (52.1%), United States (47.9%)
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