The resource potential of the Pasayten Wilderness in Washington was evaluated by examining all known mining claims and by making a detailed geochemical survey. Four areas have either a probable or substantiated mineral-resource potential for small- to moderate-size deposits. These favorable areas and the types of deposit they contain include the following: (1) Monument Peak region for copper-molybdenum porphyries; (2) the northern edge of the Slate Creek mining district for gold-bearing veins; (3) the Tungsten Creek area for tungsten veins; and (4) the New Hope property for copper and silver veins.