Cossatot River Ouachitas Region Tell us why this business is your favorite! Physical Address: Wickes, AR 71973 Phone: 870-385-2201 On Lake/River (Cossatot River) This scenic river begins in the Ouachita Mountains southeast of Mena and flows south for about 26 miles to Gillham Lake. Thrilling white water for experienced canoeists only; hiking trails, primitive camping Add to Trip Planner