The Great Bear Wilderness Area comprises 285,771 acres just south of Glacier National Park [1], north of the Bob Marshall Wilderness Area [2], on the west side of the Continental Divide. An airstrip at Schafer Meadows is an unusual feature of this wilderness area, and it’s possible to fly in; call Red Eagle Aviation (406/755-2376) for details.
Trailheads from the Spotted Bear Ranger Station lead to Lodgepole Creek and the Spotted Bear River. Just about every trail in the wilderness complex will go into the valley of the South Fork of the Flathead River. The headwaters of the Middle Fork of the Flathead River are in the Great Bear Wilderness.
Links:
[1] http://www.moon.com/destinations/montana/glacier-national-park
[2] http://www.moon.com/destinations/montana/missoula-and-northwestern-montana/the-swan-and-blackfoot-valleys/bob-marshall-wilderness-area