extends N off Gulf of Alaska, E of Kenai Peninsula, bounded on S by Montague I. and Hinchinbrook I. 70 miles wide and 30 miles long.
Named by Captain Cook (1785, v.2, p. 366), RN, about May 20, 1778. It was called Entrada del Prince Guillermo by Laperouse in 1786. The Eskimo name, published by Lieutenant Sarichev (1826, map 5), Imperial Russian Navy (IRN), was Guba Chugatskaya or Chugach Gulf.