PA 662 begins at an intersection with US 422 in the community of Douglassville in Amity Township, Berks County. The road heads to the north on two-lane undivided Old Swede Road, passing residential neighborhoods in the community of Amity Gardens to the west and industrial development to the east. The route passes more homes as it turns northwest and passes through the community of Amityville. Past Amityville, PA 662 enters more agricultural surroundings with a few residences. In Yellow House, the road crosses PA 562 and enters Oley Township, where the name of the road becomes Memorial Highway. The route heads north-northwest through farmland in the Oley Valley region before reaching a roundabout with PA 73 in the community of Oley. At this point, PA 662 forms a concurrency with PA 73 by turning northwest onto that road, with the name remaining Memorial Highway. The two routes pass a few businesses in Oley, bypassing the residential center of the community to the southwest, before heading into areas of farms and woods.