Idaho.

Area name Acreage Public Law establishing Federal land manager Craters of the Moon Wild 43,243 91-504 USDI-NPS Hells Canyon Wild 1 83,800 94-199 USDA-FS Sawtooth Wild 216,383 92-400 USDA-FS Selway-Bitterroot Wild 2 988,770 88-577 USDA-FS Yellowstone NP 3 31,488 ( 4 ) USDI-NPS 1 Hells Canyon Wilderness, 192,700 acres overall, of which 108,900 acres are in Oregon and 83,800 acres are in Idaho. 2 Selway Bitterroot Wilderness, 1,240,700 acres overall, of which 988,700 acres are in Idaho and 251,930 acres are in Montana. 3 Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho. 4 17 Stat. 32 (42nd Cong.).