The area around Glacier Bay in southeastern Alaska was first proclaimed a U.S. National Monument on February 25, 1925. It was changed to Glacier Bay National Park and Preserve on Dec. 2, 1980 by the Alaska National Interest Lands Conservation Act. Glacier Bay National Park and Preserve is a United States National Park in the southeastern part of Alaska west of Juneau. The park area was included in an International Biosphere Reserve in 1986 and is part of a UNESCO World Heritage Site. The park covers 5,130 mi? (13,287 km?). Most of the park is a designated wilderness area which covers 4,164 mi? (10,784 km?) of the park.

No roads lead to the park and it is most easily reached by air travel. During some summers there are ferries to the small community of Gustavus or directly to the marina at Bartlett Cove. Despite the lack of roads, there are over 300,000 visitors per year, mostly on cruise ships

The marine wilderness of Glacier Bay National Park and Preserve includes tidewater glaciers, snow-capped mountain ranges, ocean coastlines, deep fjords, and freshwater rivers and lakes. This diverse land and seascape hosts a mosaic of plant communities and a variety of marine and terrestrial wildlife and presents many opportunities for adventuring and learning about this unique and powerful place.

Glacier Bay offers unexcelled opportunities to study earth's most fundamental geologic processes and is a globally significant marine and terrestrial wilderness sanctuary.