The Centennial Valley of Southwestern Montana, is home to many species of iconic wildlife such as grizzly bear, wolves, moose, elk, trumpeter swans, Arctic grayling, and sage grouse. The Centennial is part of the Greater Yellowstone Ecosystem, a 385,000 acre widlife corridor, that links the Yellowstone and Salmon-Selway Wilderness habitats together. There is a variety of undeveloped habitats on the landscape, such as grasslands, sagebrush, and wetlands, with only a handful of folks that live and work in the valley.
Of the 385,000 acres that make up the Centennial, 285,000 acres are public lands, Bureau of Land Management, Forest Service, US Fish and Wildlife Service, and Montana Department of Natural Resource Conservation, with the remaining acreage being privately owned, 90% of which belonging to 15 long-time family ranches. Much of the valley is also protected thanks to conservation easements between family ranches and The Nature Conservancy, as well as having the 51,386 acre Red Rock Lakes National Wildlife Refuge and its conservation easements. Because of landowners, agencies, and non-profits working together, the Centennial Valley has remained pristine, and undeveloped compared to the rest of Montana's and other western valleys. Continued partnerships and excellent stewardship will prevent subdivision, the spread of invasive weeds, and habitat fragmentation.