[3] Mill Creek Wilderness consists of towering stone pinnacles, steep canyons, barren ridge tops, and high elevation meadows.

[1][4] The northwest corner of the Wilderness is Bingham Prairie, an almost flat plateau with open meadows and a lodgepole pine forest.

[5] Other plants in Mill Creek Wilderness include aster (genus), bull thistle, snowberry, and both native and non-native species of grass.

[7] Mill Creek Wilderness is home to a variety of wildlife, including black bear, wild turkey, pileated woodpecker, goshawk, elk, mule deer, bobcat, and mountain lion.

[1][5] The Wilderness is popular with big game hunters during the fall, and anglers often seek the small rainbow trout that inhabit its perennial streams.