Good Mine Loop Trail

The Billy Goat Trail is a 4.7-mile (7.6 km) hiking trail that follows a path between the C&O Canal and the Potomac River within the Chesapeake and Ohio Canal National Historical Park near Great Falls in Montgomery County, Maryland. The trail has three sections: Section A, the northernmost, is 1.7 miles (2.7 km); Section B is 1.4 miles (2.3 km); and Section C, the southernmost, is 1.6 miles (2.6 km)

Olmsted Island is a small island in the middle of the Potomac River in the U.S. state of Maryland, near Great Falls which is a part of C & O Canal National Historical Park, located across the river from Great Falls Park. It is a part of Potomac, Maryland.Named for Frederick Law Olmsted, Jr., the landscape architect and preservationist whose famous father designed New York's Central Park, the small island is a bedrock terrace forest that supports rare, threatened and endangered plant species.