Which mountain range runs along the east coast of North America?

The Appalachians dominate the eastern United States and separate the Eastern Seaboard from the interior with a belt of subdued uplands that extends nearly 1,500 miles from northeastern Alabama to the Canadian border. They are old, complex mountains, the eroded stumps of much greater ranges. Present topography results from erosion that has carved weak rocks away, leaving a skeleton of resistant rocks behind as highlands.

Source: Britannica