The Mackenzie River is Canada’s longest, flowing 4,241 km (2,635 miles) through the Northwest Territories. 6. What is the longest river in Europe? The Volga River in Russia is Europe’s longest ...

Eastern Canada's longest river, the 418-mile St. John, runs down the western edge of New Brunswick along the border with Quebec to the Bay of Fundy. Parallel its path through the St. John River ...