16 U.S.C. § 460gg

(a) In general To assure that the natural beauty, and historical and archeological values of the Hells Canyon area and the seventy-one-mile segment of the Snake River between Hells Canyon Dam and the Oregon-Washington border, together with portions of certain of its tributaries and adjacent lands, are preserved for this and future generations, and that the recreational and ecologic values and public enjoyment of the area are thereby enhanced, there is hereby established the Hells Canyon National Recreation Area. (b) Boundaries; publication in Federal Register The Hells Canyon National Recreation Area (hereinafter referred to as the “recreation area”), which includes the Hells Canyon Wilderness (hereinafter referred to as the “wilderness”), the components of the Wild and Scenic Rivers System designated in section 3 of this Act, and the wilderness study areas designated in section 460gg–5(d) of this title , shall comprise the lands and waters generally depicted on the map entitled “Hells Canyon National Recreation Area” dated May 1978, which shall be on file and available for public inspection in the office of the Chief, Forest Service, United States Department of Agriculture. The Secretary of Agriculture (hereinafter referred to as “the Secretary”), shall, as soon as practicable, but no later than eighteen months after December 31, 1975 , publish a detailed boundary description of the recreation area, the wilderness study areas designated in section 460gg–5(d) of this title , and the wilderness established in section 460gg–1 of this title in the Federal Register.