The Rocky Mountains are a large mountain range that stretches from Canada to Mexico through the western side of the United States and contains the Continental Divide
The Appalachians Mountains Are thought to be one of the oldest mountain ranges in the World and stretches from Eastern Canada to Western Alabama. There are 2,190 miles of hiking trails, It would take an average hiker 5-7 months to complete the Appalachian Trail.
The Coastal Plains are flat low lying lands and are located along the Atlantic Ocean and the Gulf of Mexico. The Coastal Plain extends inward from the coast an avererage of 75 miles and contains no mountains.