12+ Rocky Mountains In The Us Images. They are estimated to have been formed more than 80 million years ago. Conditions in the mountains can change quickly!
The rocky mountains, also known as the rockies, are a major mountain range in western north america.
The rocky mountains are situated in the northwestern region of the united states and extend to some southwestern states. In between the ranges are valleys and large basins. They are estimated to have been formed more than 80 million years ago. The rocky mountains stretch more than 3,000 miles (4,800 kilometers) from british columbia, in canada, to new mexico.