Caribou–Targhee National Forest spans scattered lands in Idaho, Wyoming, and a small part of Utah, covering about 2.63 million acres within the Greater Yellowstone Ecosystem. Formed from the older Caribou and Targhee National Forests, whose origins date to 1891, it includes habitats ranging from sagebrush and grasslands to high-elevation spruce, fir, and lodgepole pine. The forest borders major protected landscapes, contains notable features such as Big Springs, and supports extensive recreation. Its wilderness areas protect karst country, cave systems, and grizzly bear habitat, while its broader importance lies in sustaining diverse wildlife and serving as a fragile corridor linking the northern and southern Rocky Mountains.