Greenbrier State Park to Washington Monument Loop is a 12 mile loop trail located near Boonsboro, MD that features a great forest setting. The trail is rated as difficult and primarily used for hiking and walking. Dogs are also able to use this trail but must be kept on leash.
dogs on leash
Strenuous hike from Greenbrier State Park to the Appalachian Trail leading to Washington Monument. This hike in Washington County begins in Greenbrier State Park bear Greenbrier Lake. With significant inclines, this hike passes Greenbrier Lake, and the Visitors center for Greenbrier State Park. It then ascends the Bartman Trail that connects to the Appalachian Trail. Heading south towards Washington Monument, the trail continues to climb. Many rocky trail sections, but no stream crossings. Some sections in Greenbrier SP can be muddy.