Interactive Maps

The Lower Potomac

The Potomac Estuary

Mount Vernon to Anacostia River

Mall Area

Georgetown to Great Falls

Potomac Piedmont

Upper Potomac

The North Branch

Boat Ramps

Monitoring Sites

Bridges and Ferries

Cruises and Charters

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Also Explore

Sideling Hill Creek

Tributary

Sideling Hill Creek starts in Pennsylvania and meanders 25.2 miles to reach the Potomac. The Creek is the boundary between Allegany and Washington Counties.

Suggested Links

Contact Information
Maryland Department of Natural Resources

MD

Website