Quehanna Trail at Mile Mark 0.5. The Quehanna Trail begins at the eastern edge of the lake at Parker Dam State Park with a 375 foot rise in evelevation over the next 3 miles to Tyler Road. The trail is marked with Orange blazes and begins by following Laurel Run to its right. June 14, 2010, 7:58AM N41° 11.332' W078° 30.173'