Where is MacKenzie River?

The Mackenzie River is the longest river in Canada located in the Northwest Territories and covering a distance of around 1025 mi long and 1-2 mi wide. It begins at Great Slave Lake in the Northwest Territories and flows north into the Arctic Ocean. It is the second largest river system in North America (after the Mississippi-Missouri river system), and the fourth largest of all river systems discharging into the Arctic Ocean (the three largest are in Russia). It includes three major lakes (Great Slave, Great Bear and Athabasca) and numerous major rivers (such as the Peace, Athabasca, Liard, Hay, Peel, South Nahanni and Slave rivers). It spans four physio-graphic regions: Western Cordillera, Interior Plain, Precambrian Shield and Arctic Coastal Plain.