Nearly all rivers west of the Appalacians and east of the Rockies run into the Mississippi, or into some other river that runs into (another river that runs into...) the Mississippi.
A couple of examples that do it directly: the Illinois, the Missouri, the Arkansas.
colorado
The Yazoo River is in west central Mississippi and flows into the Mississippi River.
west region
Five states are on the west side of the Mississippi River. The west side of the Mississippi River borders Iowa, Missouri and Arkansas. The river flows through Minnesota and Louisiana.
Mississippi is bordered by the Mississippi River to the west.
Five states are on the west side of the Mississippi River. The west side of the Mississippi River borders Iowa, Missouri and Arkansas. The rivers flows through Minnesota and Louisiana.
Ohio River Actually, the Ohio River flows to the Southwest... rather than "due" West...
Mississippi is bordered by the Mississippi River to the west.
Mississippi is bordered by the Mississippi River to the west.
Colorado River?
Five states are on the west side of the Mississippi River. The west side of the Mississippi River borders Iowa, Missouri and Arkansas. The river flows through Minnesota and Louisiana.
Open your book, look at the map, trace the route of the river.