Mt. Kaʻala (pronounced [kəˈʔɐlə] in Hawaiian) is the highest peak on the island of Oahu, at 4,020 ft. It is a part of the Waianae Range, which is located on the west side of the island. The FAA maintains an active tracking station at the summit, which is closed to the general public and secured by the US Army which is stationed just on the base of the mountain, called Schofield Barracks. The tracking station can be clearly seen from afar as a white domed shaped structure.