the Potomac River
The two natural borders of Maryland are the Potomac River to the south and the Mason-Dixon Line to the north, which separates Maryland from Pennsylvania.
The Potomac River is located in 4 states. The river forms part of the borders between Washington, D.C. and Virginiaon the left descending bank and Maryland and Virginiaon the river's right descending bank
Delaware is east of Maryland.
Maryland and New jersey!!
The Colorado River borders California.
Yes. The Potomac river borders the other part of Washington DC.
The states that border Maryland are Delaware, Pennsylvania, and Virginia.
Pennsylvania borders Maryland to the south.
What river border Iowa
Pennsylvania
The Great River o' Maryland.