The Bighorn/Weitas roadless area of 250,000 acres! is another de facto wilderness in the northern part of the Clearwater Mountains. It lies just to the south of Mallard-Larkins, west of the Great Burn, and north of the Lochsa River. Wildlife and topography are similar, although Bighorn-Weitas has no lakes and the peaks don't reach as high. Weitas Creek and Cayuse Creek are large streams and blue ribbon trout fisheries.

Two or more wolf packs currently use the area, much to irritation of some, but there is little evidence they have depleted deer or elk numbers.