Pennyfield Lock Boat Ramp offers a concrete launching facility suitable for small flat-bottom motorized boats, canoes, and kayaks, with access to both Muddy Branch and the Potomac River via a stone viaduct under the C&O Canal.

The 2010-renovated ramp features an 11-foot width, small paved parking lot, handicapped accessible parking, and a deep pool downstream for easier launching.

Note that clearance under the canal aqueduct is only 4 feet at high water, and access may occasionally be blocked by debris or fallen trees.