Interstate Commission on the Potomac River Basin
The Potomac above Washington is a fascinating river, which quickly sheds its urban character and becomes a near wilderness, full of history and wildlife. Alongside the river for 184 miles winds the Chesapeake and Ohio Canal, an engineering milestone of the 19th century. Begun in 1828, the canal took two decades to complete its 74 locks, 11 stone aqueducts, and seven dams to feed the waterway from the Potomac. Maintained today by the National Park Service, the canal is one of the best ways to reach the Potomac for hiking and biking along its banks. Floods have long ravaged the canal, however, and only the 22 miles from Washington to Seneca (maps 1-4) are watered. These maps span 92 miles of the most popular part of the river and canal above Washington.
Each map listed below shows a portion of the Chesapeake and Ohio Canal in the Lower Potomac River area. Elegant printed map sets of the Upper Potomac River area are available for purchase.