The length of Alger Island is 10 km (6.2 mi) and its maximum width 4.7 km (2.9 mi). Its highest point is the 429 m (1,407 ft) high summit of the Kupol Vostok Pervyy (Купол Восток Первый) ice dome that covers part of the island.[1] There are wide unglaciated areas on the northern and the southwestern shores.