The river that drains east of the Appalachian Mountains is the Potomac River.
The Potomac River flows across a significant portion of the eastern United States, starting in West Virginia and eventually emptying into the Chesapeake Bay, which is located east of the Appalachian Mountain range. This river is crucial for several reasons: it serves as a natural border between Maryland and Virginia, it’s historically important for transportation and trade, and it provides recreational opportunities for residents and tourists alike. The Potomac is also known for its picturesque views and the surrounding landscapes that include parts of the Great Falls Park and the C&O Canal National Historical Park.