Wilderness . (M) Ogden Mountain Wilderness Certain Federal land within the Helena National Forest comprising approximately 8,000 acres, identified as Ogden Mountain Wilderness on the Map, which shall be known as the Ogden Mountain Wilderness . (N) Nevada Mountain Wilderness Certain Federal land within the Helena National Forest comprising approximately 54,000 acres, identified as Nevada Mountain Wilderness on the Map, which shall be known as the Nevada Mountain Wilderness . (O) Blackfeet Wilderness Certain Federal land within the Lewis and Clark National Forest comprising approximately 129,000 acres, identified as Blackfeet Wilderness on the Map, which shall be known as the Blackfeet Wilderness . 103. Greater Yellowstone ecosystem (a) Definition of Map In this section, the term Map means the map entitled Greater Yellowstone and dated April 28, 2016. (b) Designations To protect the unique ecosystem of the greater Yellowstone ecosystem, the following land is designated as wilderness: (1) Absaroka-Beartooth Wilderness Additions Certain Federal land within the Custer Gallatin National Forest and the Shoshone National Forest comprising approximately 265,000 acres, identified as Absaroka-Beartooth Wilderness Additions on the Map, is incorporated in, and shall be administered as part of, the Absaroka-Beartooth Wilderness. (2) North Absaroka Wilderness Additions Certain Federal land within the Shoshone National Forest and the Custer Gallatin National Forest comprising approximately 173,000, identified as North Absaroka Wilderness Additions on the Map, is incorporated in, and shall be administered as part of, the North Absaroka Wilderness. (3) Washakie Wilderness Additions Certain Federal land within the Shoshone National Forest and land administered by the Lander Field Office of the Bureau of Land Management comprising approximately 339,000 acres, identified as Washakie Wilderness Additions on the Map, is incorporated in, and shall be administered as part of, the Washakie Wilderness. (4) Fitzpatrick Wilderness additions