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

McMahons Mill

Maryland Recreation Site

Photo of McMahons Mill

At Canal Mile 88 is a former private campground with campsites for recreational vehicles and tents. The site was located close to the Dam #4 boat ramp. A museum featured artifacts from the civil war era.

Note: McMahons Mill was damaged by high water in the fall and winter of 2018. It is currently closed during a reconstruction of the canal from McMahons Mill to Lock 49, approximately one mile. The parking area at McMahons Mill is also closed. The $18 million project will raise the level of the towpath to avoid flooding and damage to the wall. The canal has established a detour along local roads.

Suggested Links

Click here for larger map and nearby sites.

Contact Information
C&O Canal National Historic Park
142 W. Potomac St.
Williamsport MD 21795