Cumberland Valley

(1) Starting immediately west of the Town of Williamsport in Washington County, Maryland, at Lock 45 of the Chesapeake & Ohio (C&O) Canal National Historical Park and the confluence of the Potomac River and Conococheague Creek (see Williamsport Quadrangle), the boundary proceeds in a southeasternly direction along the perimeter of the park on the northeastern bank of the Potomac River to the confluence of Antitam Creek and the Potomac River; (2) Then southeast of Limekiln Road which runs along the perimeter of the park from Antietam Creek to the intersection of Limekiln Road and Harpers Ferry Road; (3) Then northeasterly a straight line approximately two miles to the 952-foot summit of Hawk's Hill; (4) Then northerly on a straight line approximately 2.5 miles to the intersection of Red Hill Road and Porterstown Road; (5) Then southeasterly along Porterstown Road to its intersection with Mount Briar—Trego Road; (6) Then southerly along Mount Briar—Trego Road to its intersection with Millbrook Road; (7) Then east along Millbrook Road to its intersection with State Route 67, approximately 0.5 mile north of Rohersville, Maryland; (8) Then directly east approximately 1.25 miles in a straight line to the 1,000-foot contour line of South Mountain; (9) Then in a north northeasterly direction along the 1,000-foot contour line of South Mountain in Washington County, Maryland, and Frankli…