The Rocky Mountains, commonly known as the Rockies,
are a major mountain range in western North America.
The Rocky Mountains
stretch more than 3,000 miles (4,830 km) from the northernmost part of British
Columbia,
in western Canada,
to New Mexico,
in the southwestern United States.
Within the North American Cordillera,
the Rockies are somewhat distinct from
the Pacific Coast Ranges and the Cascade Range and Sierra Nevada which all lie
farther to the west.
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