Here are some links to sites related to Idaho’s Centennial Trail.
Idaho State Parks site, including Centennial Trail Bureau of Land Management Boise National Forest Sawtooth National Forest Payette National Forest Salmon-Challis National Forest Nez Perce National Forest Bitterroot National Forest Clearwater National Forest Idaho Panhandle National Forests Sawtooth National Recreation Area Frank Church Wilderness information Another Frank Church Wilderness site Selway Bitterroot Wilderness information