The Alexander Archipelago is a 300 miles (500 km) long archipelago, or group of islands, of North America off the southeastern coast of Alaska. It contains about 1,100 islands, which are the tops of the submerged coastal mountains that rise steeply from the Pacific Ocean. Deep channels and fjords separate the islands and cut them off from the mainland. The northern part of the Inside Passage is sheltered by the islands as it winds its way among them. Tourism, fishing, and logging are the main industries of the islands.