The Canadian Rockies, also known as the Canadian Rocky Mountains, encompass both the Alberta Rockies and the British Columbian Rockies and form the Canadian portion of the North American Rocky Mountains. This range is the easternmost part of the Canadian Cordillera, a segment of the larger North American Cordillera, a vast network of mountain ranges stretching from central Alaska to Mexico's Isthmus of Tehuantepec. Canada defines the Rocky Mountains as the mountain chains located east of the Rocky Mountain Trench, extending from the Liard River valley in northern British Columbia to the Albuquerque Basin in New Mexico. This definition excludes the Mackenzie, Richardson, and British Mountains/Brooks Range in Yukon and Alaska, which the United States refers to as the "Arctic Rockies." The Canadian Rockies are considered the northern part of this chain and are situated between the Alberta Prairies and the Liard Plain of northeastern British Columbia to the east, and the Interior Mountains/Plateau and Columbia Mountains to the west. They are divided into the Northern Rockies (which includes the Muskwa and Hart Ranges) and the Continental Ranges, separated by the McGregor River valley, McGregor Pass, and Kakwa River valley. The southern portion of the Canadian Rockies extends into Montana, USA, with notable sites such as the Wilson Range, Upper Waterton Lake, and Marias Pass. While geographically, the boundary is the Canada–United States border at the 49th parallel, geologically, it can be considered at Marias Pass in northern Montana. The Canadian Rockies are home to numerous high peaks, including Mount Robson (3,954 meters; 12,972 feet) and Mount Columbia (3,747 meters; 12,293 feet). The range is primarily composed of shale and limestone, and much of it is protected by national and provincial parks, many of which together form a UNESCO World Heritage Site.

Canadian Rockies - Wikipedia