Potomac River Guide Home

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

Also Explore

The Hudson River GuideThe Delaware River Guide

C and O Canal Headquarters

National Historical Park

Photo of C and O Canal headquarters

The canal headquarters is located in a renovated buiding in Williamsport, Md, adjacent to the canal visitor center and several other canal facilities. The headquarters moved from an office building in Hagerstown, Md., to be closer to the canal and its activities.

Suggested Links

Click here for larger map and nearby sites.

Contact Information
National Park Service
142 W. Potomac St.
Williamsport MD 21795