Canada's major rivers based on discharge

The Saint Lawrence River is the largest river in Canada based on the volume of water that flows through the river per second. However, the Mackenzie River system, located in the Northwest Territories is the longest river in Canada at about 4,240 kilometers. Globally, the Nile River is the longest river on Earth, measured at 6,671 kilometers.

Saint Lawrence River

The Saint Lawrence River begins at the outflow of Lake Ontario, the fifth largest lake in Canada. The biggest lake in Canada is Lake Superior, which shares its borders with the United States. The river drains into the Gulf of Saint Lawrence, which is one of the largest estuary in the world. Estuaries are partially enclosed bodies of brackish water and act as a transition zone from river environments into maritime environments. The

French navigator discovered Saint Lawrence River

Saint Lawrence River was named by the first European explorer to sail into the river, Jacques Cartier. As Cartier arrived in the estuary on Saint Lawrence’s feast day, he named the river after the saint.