Yunaska Island, Alaska

Yunaskais an uninhabited island which is the largest of the Islands of Four Mountains group in the Aleutian Islands of southwestern Alaska, United States. It has a land area of 66.834 square miles (173.099 square kilometres)

The island comprises two volcanic mountains, with a valley between. The western mountain is composed of four overlapping and eroded stratovolcanoes, with a cinder cone field at the western end. It has not been historically active. The eastern mountain is a large shield volcano with two overlapping summit calderas, which last erupted in 1937.

Information on this Web Site has been obtained from the Cruise Companies represented. However, the cruise industry is constantly changing and should be used as a guide only. We are unable to take responsibility for incorrect information and you must confirm all details at the time of booking.