Valley Road, PA Rte. 850, PA, June 2015 For northbounders, approximately 0.3 mile north of Millers Gap Road, the A.T. crosses Valley Road, PA Route 850. The A.T. parking area is located on the south side of Valley Road approximately 150 feet to the west of the trail. This is a view of the side trail from the A.T. parking area looking east toward the trail.