Denali National Park and Preserve is a national park and preserve in Alaska's interior that is focused on Denali, North America's tallest peak. More than 6 million acres make up the park and its surrounding reserves. The national preserve has a total area of 1,334,200 acres. A 2,146,580-acre Denali Wilderness was declared within the park on December 2, 1980. Denali's terrain is a combination of woodland and deciduous taiga at its lowest elevations. Tundra may be found at moderate elevations, whereas glaciers, rock, and snow can be found at higher elevations. The Kahiltna Glacier is the world's longest glacier. In 2016, the park attracted 587,412 recreational visits. Dog sledding, cross-country skiing, and snow machining are all popular winter pastimes.