Caribou and Targhee National Forests were combined from original forest lands created in 1891. Two designated wilderness areas are located in the easternmost sections of the forest, bordering on National Park lands. The Jedediah Smith Wilderness is adjacent to Grand Teton National Park on the western slope of the Teton Range. Known for karst limestone formations, the wilderness has many caves and provides excellent views of the less often seen west face of the Teton peaks. The smaller Winegar Hole Wilderness borders Yellowstone National Park and the John D. Rockefeller, Jr. Memorial Parkway, and was set aside primarily to protect prime grizzly bear habitat.