Irbistu

the highest mountain peak in the Iuzhno-Chiuskii Range in the Gorno-Altai Autonomous Oblast, at the source of the Elongash River. Altitude, 3,960 m. The peak is composed of metamorphic schists and covered with snow. A valley glacier (Irbistu Glacier, 4 km long), as well as cirque and hanging glaciers, descends from the northern slope.