Chagulak Island is a small, uninhabited volcanic island in the Islands of Four Mountains group in the Aleutian Islands of southwestern Alaska, United States. The 1.9mi-wide island consists of a single cone that reaches an elevation of 3,747 ft . Chagulak is a stratovolcano and is separated from the nearby Amukta Island by a channel about 4.3mi wide; though the two islands are joined underwater. No eruptions have been recorded and very little is known about the volcano.