The Centennial Valley is a place of sweeping grasslands and wetlands, embraced by the forest ragged peaks of the Centennial and Gravelly Mountains. The Centennial looks very much as it did more than a century ago. In parts of the valley, not so much as a power line mars the view. In the winter, just a handful of people inhabit the valley. Summer, the human population is usually fewer than 50 - and they are far outnumbered by the horses and the cattle.