On Beaufort Sea coast W of Flaxman I., extend between Challenge and Mary Sachs Entrances, Arctic Plain.
Named in 1910 by Leffingwell (1919, p. 97) Commander Rochfort Maguire, Rn.
Point Gordon, Point Hopson, Point Sweeney, Point Thomson,
Channels:Challenge Entrance, Mary Sachs Entrance,
Islands:Alaska Island, Challenge Island, Duchess Island, North Star Island,