四岳
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 across and consists of a single stratovolcano cone that reaches a height of . The island has an area of . No eruptions have been recorded in historical times, though it is thought to have been active at some time during the Holocene Epoch.