Mackenzie River summary

Athabasca River, river in northern Alberta, Canada, forming the southernmost part of the Mackenzie River system. From its source in the Columbia Icefield (Canadian Rocky Mountains) near the Continental Divide, the river flows through Jasper National Park, site of the spectacular Athabasca Falls,

Northwest Territories, region of northern and northwestern Canada encompassing a vast area of forests and tundra. Throughout most of the 20th century, the territories constituted more than one-third of the area of Canada and reached almost from the eastern to the western extremities of the country,

Canada, the second largest country in the world in area (after Russia), occupying roughly the northern two-fifths of the continent of North America. Despite Canada’s great size, it is one of the world’s most sparsely populated countries. This fact, coupled with the grandeur of the landscape, has

North America, third largest of the world’s continents, lying for the most part between the Arctic Circle and the Tropic of Cancer. It extends for more than 5,000 miles (8,000 km) to within 500 miles (800 km) of both the North Pole and the Equator and has an east-west extent of 5,000 miles. It