Prince William Sound encompasses 3,800 miles of coastline, bounded to the East and North by the Chugach Mountains and to the West by the Kenai Peninsula. Commercially important for the fishing and oil industries, the sound is also prized for its abundance of marine and coastal life, its rain forest of Sitka spruce and western hemlock, and its glacier-studded landscape. The sound contains 150 glaciers including 17 tidewater glaciers, known for dramatically calving huge ice chunks into the sea.