Potomac River On A Map. ICPRB > Focus Areas > Aquatic Life > Potomac River Mainstem > Map The Potomac River is 652 km (405 miles) in length and has a drainage basin of 38,000 km 2 (14,700 square miles), which makes it the fourth largest river on the United States' Atlantic Coast
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Lee crossed the river, thereby invading the North and threatening Washington, D.C., twice in campaigns climaxing in the battles of Antietam (September 17,. The Potomac River is 652 km (405 miles) in length and has a drainage basin of 38,000 km 2 (14,700 square miles), which makes it the fourth largest river on the United States' Atlantic Coast
The Potomac Basin (light yellow) with the Potomac River segments indicated: Upper Potomac, Middle Potomac, Lower Potomac, and the Tidal. Location: Potomac River, Maryland, United States (37.87065 -78.58694 39.69716 -76.16186) The Potomac River is 652 km (405 miles) in length and has a drainage basin of 38,000 km 2 (14,700 square miles), which makes it the fourth largest river on the United States' Atlantic Coast
. Average elevation: 449 ft • Potomac River, Maryland, United States • Visualization and sharing of free topographic maps. It runs from Fairfax Stone, West Virginia to Chesapeak Bay.
. This map shows the location of the river and its watershed area which spans across several geological regions including the Appalachian Plateau, Ridge & Valleys, Blue Ridge, Piedmont. The two branches (95 miles [150 km] and 130 miles long [209 km], respectively) flow generally northeast and unite southeast of Cumberland , Maryland , to continue southeast through the District of Columbia into Chesapeake Bay .