The Arkansas River
The Mississippi River is west from the Rocky Mountains. The Rocky Mountains are on the western coast of the USA, and the Mississippi river is in the middle of the USA. Therefore, the Mississippi River is west from the Rocky Mountains.
The Arkansas River.
Mountains
mountains
well one is the arkansas river!
Arkansas River
The Missouri River
mountains
The Amazon River begins high in the Andes Mountains
The Ozark Mountains, The Oauchita Mountains, The Arkansas River Valley, The Crowly's Ridge, The Mississippi Aluval Plains, and The West Gulf Coastal Plains.
The Rocky Mountains and the Missouri River