I-81 Bridge

Potomac River Highway Bridge

A mile downstream from Williamsport, Md., Interstate 81 crosses the Potomac. The road carries a large number of trucks on a popular north-south route. The road generally follows the old route of U.S. 11 from New York State to Tennessee along the Appalachian Mountains.

Nearby Potomac River Crossings
Upstream	Downstream
U.S. 11 Bridge at Williamsport, MD	CSX Railroad Bridge, Berkeley County, WV
To view all Potomac River crossings, select this link.

The Hudson River Guide	The Delaware River Guide
NEW! The Connecticut River Guide

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 Search Potomac Sites

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I-81 Bridge

Potomac River Highway Bridge

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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

Search Potomac Sites