Located 14 miles from Washington D.C., Dihedrals Wall is one of many cliffs that sit along the Potomac River in Great Falls National Park. The rock is steep and drops straight into the river. With a variety of activities and the pleasant atmosphere, this area is a gem and very popular. Most of the climbing is toprope using trees for anchors. To approach the wall follow the trail and watch for the Mather Gorge plaque. Scramble down either side of the cliff to reach the bottom.