Field investigations were conducted to evaluate the mineral-resource potential of the Teton Wilderness, the Teton Corridor, and the Du Noir Addition to the Washakie Wilderness in Wyoming. As a result of this study it was determined that there is little promise for the occurrence of metallic mineral resources, but there is probable potential for oil and gas resources in two anticlines in the western part of the Teton Wilderness and in the postulated Younts Basin in the eastern part of the wilderness and the eastern part of the Du Noir Addition. The Whetstone anticline is the largest.