 Within the United States, most of it is under the administration of the Tongass National Forest and is part of the Stikine-LeConte Wilderness within the national forest.An extremely large icefield, the icecap is a primary source for both the Taku River, which forms its northern boundary, and the Taku's southern tributaries, and also the Stikine River and its lower western tributaries, notably the Chutine, which form its southern and southwestern boundary, respectively.The Stikine Icecap is the parent icefield of the LeConte and Sawyer Glaciers on its US side, and the Great Glacier on its Canadian side.