The Appalachian Mountain
The Appalachian Mountains.
If you mean the eastern US, it is the Appalachian mountain range.
The main Mountain range is the Appalachian Mountains.
The Sierra Madre Oriental is the mountain range that crisscrosses Mexico from north to south on its eastern side.
In the Eastern section of United States of America the main mountain range is the Appalachians. In the Western section of United States of America the main mountain range is the Rocky Mountains. Hope that helped!
The Appalachian Mountains are the main mountains running through the eastern US
The Appalachian Mountains run through the eastern United States. Mount Mitchell in North Carolina is the highest point of the Appalachians at 6,684 feet.