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
It is approximately 660 miles from Detroit, MI to Toms River, NJ. If driving between these two locations, one would travel across both Ohio and Pennsylvania.
The Delaware River.
Two Pennsylvania rivers are the Susquehanna River and the Allegheny River.
delaware river ohio river