Crossing the Mason-Dixon Line from Gettysburg into Maryland on US‑15, our route veers west into the Appalachian foothills of Catoctin Mountain Park, site of the presidential retreat Camp David.

The landscape here is quite rugged, and signs of life few and far between—an oasis of peace and quiet, under an hour by road from Baltimore or Washington, D.C. Winding south through the mountains of the Maryland Panhandle (the thin strip of land that stretches for some 75 miles between Pennsylvania and West Virginia), this route again meets the hikers’ Appalachian Trail, then detours to visit the battlefield of Antietam, the well-preserved site of the worst carnage of the Civil War.

Map of Appalachian Trail through Maryland.
Map of Appalachian Trail through Maryland.