Grand Wash Cliffs (1,000 ft/305 m2,000 ft/610 m), in Mohave co., NW Ariz., extending N from the point near Music Mts. with Hualapai Indian Reservaton to E, to lat. 36°30'N. Bisected by Grand Canyon, N of Colo.; escarpment of Shivwits Plateau, near Nev. state line.