Glacier Bay National Park and Preserve is a United States national park and preserve in the Alaska panhandle west of Juneau. President Calvin Coolidge proclaimed the area around Glacier Bay a national monument under the Antiquities Act on February 25, 1925. Subsequent to an expansion of the monument by President Jimmy Carter in 1978, the Alaska National Interest Lands Conservation Act (ANILCA) enlarged the national monument by 523,000 acres (2116.5 km²) on December 2, 1980 and in the process created Glacier Bay National Park and Preserve, with 57,000 additional acres (230.7 km²) of public land designated as national preserve to the immediate northwest of the park in order to protect a portion of the Alsek River and related fish and wildlife habitats while allowing sport hunting.