The highest peak of the island, the Mount Vsevidof stratovolcano, is located in the southwestern part of the island. Its symmetrical cone rises abruptly from its surroundings and forms a crater at a height of . Its most recent eruption was caused by an earthquake on March 9, 1957. The mountain erupted on March 11, 1957, and the eruption ended the next day. To the east of Mount Vsevidof is the Russian Bay valley and another stratovolcano, Mount Recheshnoi which is also deeply dissected with a height of . In the southwest is the settlement of Nikolski further south and a lake, Umnak Lake, to its southeast which is just over in length. The ancient settlement of Chaluka is located between this lake and Nikolski. This area is known as the Samalga Pass and was the center of ancient activity on the island and is located about off the southwestern tip of the island (Cape Sagak).