The greater part of the north-western coast of the Nunavut Territory is covered by a portion of the Arctic Cordillera, which range of mountains is called the Innuitian Mountains, which mountains are named after the native indigenous people, the Inuit. The Innuitian Mountains are almost entirely within the Nunavut Territory in extreme northern Canada. The land whereupon these mountain rise are all within the Arctic Mountains Islands ecoregion.

Again, the Innuitian Mountains are a part of the Arctic Cordillera, and are largely unexplored, due to the extreme northern location. In some locations the Innuitian mountains measure over 8,202 feet in height (2,500 km), and the ranges are as much as 802 miles (1209 km) in length. The highest point is Barbeau Peak at 8,583 feet, located in the British Empire Range.

The Arctic Mountains consist of numerous smaller mountain ranges including: British Empire Range; the United States Range; and the Challenger Mountains all of Ellesmere Island. Also, on Axel Heiburg island is the Princess Margaret Range.

This area of the Arctic Mountains Region in northern Canada, called the Arctic Cordillera is a terrestrial ecozone characterized by a vast, deeply dissected chain of mountain ranges extending from the northeastern flank of the Canadian Arctic Archipelago from Ellesmere Island and south and west to Bathurst islands. These islands have high glaciated peaks rising through ice fields in which are located some of the largest ice caps in Canada.

Many of the mountain ranges are on Ellesmere island, Sverdrup island, Devon island and other islands. Some of the smaller islands only have areas which rise up to a plateau.

It is bounded to the north by the Arctic Ocean, to the northeast by Kane Basin, to the east by Baffin Bay, to the south by Lancaster Sound, the the southwest by Viscount Melville Sound and the west by Wynniatt Bay.