The Rocky Mountains were formed by plate tectonic activity during three separate events, which occurred more than 100 million years ago. The Rocky Mountains are located in the western part of the United States and stretch for 3,000 miles from Canada to Mexico. They form the Continental Divide of the U.S.
The Rocky Mountains pass through five states: Colorado, New Mexico, Idaho, Wyoming and Montana. They run along the border of the Canadian provinces of British Columbia and Alberta. The highest peak of the Rocky Mountains is Mount Elbert, which is 14,400 feet and located in Colorado. The rock structure of the Rockies consists of sedimentary and igneous rock along the margins as well as volcanic rock in localized regions.