Established as part of the National Wilderness Preservation System in November 1983, the Lee Metcalf Wilderness consists of 259,000 acres distributed across the Madison Range in southwest Montana. The wilderness contains four separate units. The Bear Trap Canyon unit of 6,000 acres is administered by the Bureau of Land Management. The other three units are administered by the Forest Service and are in the Gallatin and Beaverhead-Deerlodge national forests. The three are Spanish Peaks, 76,000 acres; Taylor Hilgard, 141,000 acres; and Monument Mountain, 33,000 acres. View our detailed information .