It is 5.36 miles (8.63 km) long and is situated at the southwestern tip of Umnak Island.
It has a land area of 1.589 square miles (4.12 km2) and is uninhabited.
It is separated from the Islands of Four Mountains group to the west by the Samalga Pass.
Samalga is the farthest point west on the Aleutian Island chain that still keeps the Alaska UTC−9 time zone (UTC−8 daylight time from the second Sunday in March to the first Sunday in November as of 2010[update]).
This article about a location in the Aleutians West Census Area, Alaska is a stub.