Sturgeon v. Frost

For almost 40 years, John Sturgeon has hunted moose along the Nation River in Alaska. Because parts of the river are shallow and difficult to navigate, Sturgeon travels by hovercraft, an amphibious vehicle capable of gliding over land and water. To reach his preferred hunting grounds, Sturgeon must pilot his hovercraft over a stretch of the Nation River that flows through the Yukon-Charley Rivers National Preserve, a 1.7 million acre federal preservation area managed by the National Park Service. 16 U.S.C. § 410hh(10).

Alaska law permits the use of hovercraft. National Park Service regulations…