The Appalachian Mountains are a system of mountains in eastern North America. Their elevation is 6,684 ft. They aren’t that tall in comparison to the Rocky Mountains (14,440 ft) and the Himalayas (29,029 ft.) But there’s was a time when the Appalachians were taller than the Himalayas. The thing is, the Himalayas are younger and they’re still increasing because the movement of India continues to put enormous pressure on the Asian continent. The Appalachians were formed the same way but there’s no force pushing them up today.