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The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch 3,000 miles (4,800 kilometers) [ 3 ] in straight-line distance from the northernmost part of Western Canada , to New Mexico in the Southwestern United States .
In geographic terms, the boundary is at the Canada–United States border on 49th parallel north, but in geological terms it might be considered to be at Marias Pass in northern Montana. The Canadian Rockies have numerous high peaks and ranges, such as Mount Robson (3,954 metres; 12,972 feet) and Mount Columbia (3,747 m; 12,293 ft).
There is no universally accepted hierarchical division of the Canadian Rockies into subranges. [1] [2] For ease of navigation only, this article follows [1] and divides the Canadian Rockies into Far Northern Rockies, Northern Continental Ranges, Central Main Ranges, Central Front Ranges and Southern Continental Ranges, each of these subdivided in distinct areas and ranges.
Rocky Mountains The Border Ranges are the southernmost subdivision of the Canadian Rockies surrounding the borders of the Canadian provinces of British Columbia and Alberta , as well as the border of the U.S. state of Montana .
The main belt of the Rocky Mountains along with the parallel Columbia Mountains and Coast Ranges of mountains and islands continue through British Columbia and Vancouver Island. In the United States, the Cordillera branches include the Rockies, the Sierra Nevada, the Cascades, and various small Pacific coastal ranges.
A small portion of the range extends into the far northwestern section of Glacier National Park, Montana, United States. [3] It is the easternmost of the Border Ranges subdivision of the Canadian Rockies. The range is named for Captain William Clark of the Lewis and Clark Expedition. [2] This range includes the following mountains and peaks:
The United States definition of the Rockies includes the Cabinet and Salish Mountains of Idaho and Montana, whereas their counterparts north of the Kootenai River, the Columbia Mountains, are sometimes considered a separate system lying to the west of the huge Rocky Mountain Trench which runs the length of British Columbia.
U.S. Route 34 in Rocky Mountain National Park. Pacific or Gulf of Mexico drainage. Pacific or Gulf of Mexico drainage. 40°28′36″N 105°49′24″W / 40.47667°N 105.82333°W / 40.47667; -105