Western
The southern part of Eastern Europe, or Southeastern Europe, is the most mountainous part of Eastern Europe.
The western part of the state is mountainous; the eastern part is flat and arid.
The Appalachian Mountains are in the Eastern United States.
The western part of North America since it is where the Rocky Mountains are.
Maryland is mountainous and hilly. The western part of Maryland has the Appalachian Mountains while the eastern part toward the ocean is flatter.
that's the way it formed.
The West is way bigger because of the rockies they are the largest in the U.S.
The Eastern portion is almost completely mountainous, covered by the Scandinavian Mountains.
Both parts are mountainous. In the west, there are the Cascades, that feed into the Rocky's (but the Rocky's are not along the coast). And in the east, the are the Appalachian mountains.
There are eight states with the most mountainous region in the US. In the south, the states are Arizona, Colorado, New Mexico, Nevada, and Utah. The north west part are Idaho, Montana, and Wyoming.
The western US is more mountainous than the eastern US. The Rocky Mountains run through states like Colorado, Wyoming, and Montana in the west, while the Appalachian Mountains traverse the eastern states like North Carolina, Tennessee, and New York.