The smaller 10,715-acre (43 km2) 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.While western sections of the forest have a mixture of sagebrush and grasses, the higher elevations in the east support lodgepole pine, and numerous species of spruce and fir.Mammalian species of black bear, wolf, elk, moose, mule deer, bison, cougar, and pronghorn have all been seen by visitors on forest lands.Caribou National Forest, the smaller and more southerly of the two, is located in southeastern Idaho, western Wyoming, and northern Utah, and has a total area of 987,221 acres (3,995 km2).The montane nature of the Caribou National Forest and its juxtaposition make it a very important, fragile and unique link between the northern and southern Rocky Mountains.