They aren't! Most deserts in the United States are located on the western side of the Rocky Mountains or eastern side of the Sierra Nevada Mountains. The Sierras block Pacific moisture from reaching inland, creating a rain shadow.
hmmmmmmmmmmmmmmmmm
Most of the deserts of the United States are located on the western side of the Rocky Mountains. However, most of the Chihuahuan Desert is located east of the Rockies.
eastern
western
the west
Most deserts are west of the Rocky Mountains.
In Colorado, it runs eastern to the Rocky Mountains. It's also located by Colorado Springs. :)
rocky I think
Western
western part
They are on the weastern side of the United States.
The Rocky Mountains are located in British Columbia.
The Rocky Mountains are in the western part of Montana. The eastern part of Montana is plains.