Old Dominion Trail – Piney Branch loop from Reston

Francis Scott Key Bridge – Horseshoe Bend at Great Falls loop from Dupont Circle

Monocacy Aqueduct – Catoctin Creek Aqueduct loop from Seneca

Korean War Veterans Memorial – World War II Memorial loop from Potomac

Seneca Quarry Stone Mill Ruins – Historic White’s Ferry (Out of service) loop from Seneca

Horseshoe Bend at Great Falls – Pennyfield Lock loop from Congressional Country Club

Catoctin Creek Aqueduct – Monocacy Aqueduct loop from Chesapeake and Ohio Canal National Historical Park

Francis Scott Key Bridge – Rock Creek Trail loop from Cabin John

Monocacy Aqueduct – Catoctin Creek Aqueduct loop from River Creek

Pennyfield Lock – Black Rock Mill loop from Pennyfield Lock Neighborhood Conservation Area

Swains Lock – Pennyfield Lock loop from Congressional Country Club

Woodburn Road Climb – Horse Farm near Philomont loop from Leesburg

Swains Lock – Pennyfield Lock loop from Potomac