Pub. L. 100-668, tit. III, sec. 301
DESIGNATION.
SEC. 301. DESIGNATION. (a) Wilderness.—In furtherance of the purposes of the Wilderness Act (16 U.S.C. 1131 et seq.; 78 Stat. 890), certain lands in the Mount Rainier National Park, Washington, which— (1) compromise approximately two hundred and sixteen thousand eight hundred and fifty-five acres of wilderness, and (2) are depicted on a map entitled “Wilderness Boundary, Mount Rainier National Park, Washington”, numbered 149/60,051A and dated July 1988, are hereby designated as wilderness and therefore as components of the National Wilderness Preservation System. Such lands shall be known as the Mount Rainier Wilderness.