That would be the Ural Mountains; see the link below for more details.
The Cascades a mountain chain is several mountains in a row
sedna
It would have to be the Rockies.
The andes
Cascade mountain range in Oregon is one. The Rocky mountains are in the western half of the U.S. but are in the Mountain time zone
ural
Sierra Madre Occidental.
The Rocky mountains.
The major mountain chain in the West is the Rocky Mountains. The major mountain chain in the East is the Appalachian Mountains.
The Sierra Nevada mountain chain.The Sierra Nevada Mountain Range.
Cordilleras
the Andes mountains