Uliaga Island (also spelled Uliagan, Ouliaga, and Ouilliaghui) is the northernmost member of the Islands of the Four Mountains group in the Aleutian Islands of southwestern Alaska. The island's name is probably derived from the Aleut place name ulaĝa, which is itself derived from ulaẍ - "bearberry." The triangular shaped island measures about 2.4 miles (3.9 km) across and consists of a single stratovolcano cone that reaches a height of 2,913 feet (888 m).