It flows westward
The Delaware.
Down the Mississippi river
It was the Missouri River
It was the Missouri River
If this is for daily geo it is Misouri River. Consider however that the Missouri does not provide a direct route between those two locations. You must first travel downstream from Pittsburgh to the Mississippi River on the Ohio River to Cairo Illinois. Then travel upstream on the Mississippi River past St Louis to enter the Missouri River. The correct answer then becomes the Missouri-Mississippi River System.
Lewis and Clark set out from St. Louis, Missouri, in May 1804. They traveled on boat up the Missouri River.
It was the Missouri River
which river is a western part of pennsylvania
Pennsylvania borders the Delaware River. The river forms part of the boundary between Pennsylvania and New Jersey, but it does not border Ohio. Ohio is located to the west of Pennsylvania and is not directly adjacent to the Delaware River.
The Delaware River.
Two Pennsylvania rivers are the Susquehanna River and the Allegheny River.
delaware river ohio river