The Ustyurt Plateau, also spelled Ust-Yurt, Ust-Urt and Usturt (, Turkmen: Üstyurt), is a central Asian plateau in Uzbekistan and Kazakhstan, lying between the Aral Sea and the Amu Darya (river) delta in the east and the Mangyshlak (Tupqarghan) Plateau and the Kara-Bogaz-Gol (Garabogazköl; an inlet of the Caspian Sea) in the west. It extends roughly 200,000 km² (77,000 square miles), with an average elevation of 150 meters (about 500 feet), and consists primarily of stony desert. Its highest point rises to a maximum of 1,200 feet (365 m) in the southwest.