Missouri River
The name of the river that flows into the Mississippi River is the Missouri River. The Missouri River is 2,540 miles. When joined they become the 3rd largest river system in the world.
Missouri RiverMissouri River; Illinois River
Missouri river
no because river is noun but Missouri river is the proper noun.
Missouri River
Mississippi river
The Mississippi River, one of the most important in the US, forms Missouri's eastern border. The Missouri River, which is also an important river, cuts the state in half.
Missouri river!
From the Native American tribe of the same name.
Kansas City , go to google & theres a park in Kansas city that sits right by the River
St. Louis, Missouri is located near the junction of the Missouri River and the Mississippi River.