The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
The major river that flows into the Mississippi River just north of St. Louis Missouri is the Missouri River. When the rivers join, they become the 3rd largest river system in the world.The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.St. Louis, Missouri is located near the junction of the Missouri River and the Mississippi River.Ohio RiverThe Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
St. Louis, Missouri is located near the junction of the Missouri River and the Mississippi River.
The Missouri River.
The Missouri River flows into the Mississippi River just north of Saint Louis, Missouri.
If you are asking about tributaries... the first river that flows into the Mississippi north of St Louis is the Missouri, but the Missouri is not really considered to be a tributary. It's a major river unto itself. Further north, the Illinois River flows into the Mississippi.
The Mississippi
The Missouri River joins the Mississippi very near St Louis.