The major mountain chain in the West is the Rocky Mountains.
The major mountain chain in the East is the Appalachian Mountains.
western- Rocky Mount. and eastern- Appalachians
There is no great mountain chain in the Southern US. There is one in the Western US and one in the Eastern US. Respectively they are the Rockies and the Appalachians.
West- Rocky Mountains East- Appalachian Mountains
Rocky Mountains and Sierra Nevadas.
Major mountain chains in Russia are Great Caucasus Rangeand the Urals
The Rocky Mountains and the Appalachian Mountains.
The Mississippi River is the western boundary of Tennessee. The Appalachian mountain chain, including the Great Smoky Mountains, are on the eastern border of Tennessee.
Great Plains
The Rocky Mountains in the west and the Appalachian in the east
the great smokey mountains.
Montana is located in the North Western region of the United States.
Appalachia does not stretch that far, the appalachian mountain range may be what you're thinking of.