These ice fields and smaller ones to the southeast Interconnected valleys between the peaks are filled with Elias Range rise to elevations of 14,000 to 19,000 feet (4,267 toĥ,791 m) from a jagged mass of peaks having elevations of 8,000 to 10,000 feet The Malaspina Glacier, one of the largest ice masses on the NorthĪmerican continent, lies at the northwestern extremity of the region. Water storage is principally in the glaciers and winter snowpack.Īlthough no permafrost exists at lower elevations, the region contains extensive In size from a few acres to several thousand acres in size and in type fromĬoastal marsh to high alpine cirque lakes. Miles or 17,358 km 2), and the Chilkat (1,230 square miles or 3,187 River (9,500 square miles or 24,611 km 2), Taku River (6,700 square The largest drainagesĪre the Stikine River (19,700 square miles or 51,036 km 2), Alsek The principal rivers are the Alsek, Chilkat, Klehini, Taku, Whiting,Ĭhichamin, Unuk, Bradfield, Speel, Stikine, and Taiya. Streams that were able to maintain their courses as the coastal mountains were The major rivers of the region originate in Canada, apparently as antecedent Theįairweather Range, the most rugged in southeastern Alaska, is the coastal extension Glacier Bay Section, the Chichagof Highland, and the Baranof Mountains. In southeast Alaska consists of the Fairweather Range, the Alsek Ranges, the Incised Boundary Mountains along the U.S. Elias Mountain Range from the irregularly
The Chatham Trough divides the coastal St. There are nearly 10,000 miles of shoreline along the islands and
Separated by a system of marine features such as sounds, straits, canals, narrows,Īnd channels. Km 2), Chicagof (2,062 square miles or 5,341 km 2), Admiralty These six are: Prince of Wales (2,770 square miles or 7,174
Square miles (10 km 2), and six are over 1,000 square miles (2,590 Is about 300 miles (483 km) long and has hundreds of islands-65 exceed four The Alexander Archipelago, an extension of the coastal mountains to the north, Wide and at least 200 miles (322 km) long. Of which is the Chatham Strait, a deep trench four to 15 miles (6.4 to 24 km) Many of the interisland waterwaysĪnd major fjords and streams occupy long linear depressions, the most prominent Often peaks as high as 10,000 feet (3,048 m). These seawaysĪre deep, many over 400 feet (122 m), and have rocky bottoms. These spectacular fjords are believed to be former drainageĬourses that were eroded and deepened by glaciers and ice currents. Southeastern Alaska is dissected by an intricate system of fjords forming aĬomplex of mountainous islands with summits 2,500 to 3,500 feet (762 to 1,067 (61 m) high and covered in part by the Malaspina Glacier, which separates theĬoast Mountains from the Gulf of Alaska. To the north the coast is regularĪnd bordered by a low, hummocky, irregular coastal plain less than 200 feet Is part of a major drainage system which extends into Canada (Figure 2).Ĭross Sound divides the area into two parts. Sixty percent of the total land area lies on the mainlandĪnd the rest consists of islands lying immediately offshore for a total surfaceĪrea of approximately 42,000 square miles (108,780 km 2). It includes the Alexander Archipelago lying directly West from Dixon Entrance on the south along the Canada-Alaska border to Capeįairweather on the north. Of mainland averaging 120 miles (193 km) wide, east of longitude 141 degrees The Southeast Region stretches nearly 600 miles (966 km) along a narrow strip
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