Roosevelt National Forest

The Roosevelt National Forest is a National Forest located in north central Colorado. It is contiguous with the Colorado State Forest as well as the Arapaho National Forest and the Routt National Forest. The forest is administered jointly with the Arapaho National Forest and the Pawnee National Grassland from offices in Fort Collins, and is denoted by the United States Forest Service as ARP.

The forest encompasses a mountainous area of the foothills on the eastern side of the Continental Divide of the Front Range in Larimer County and Boulder County. In Larimer County it includes the upper valleys of the Cache la Poudre and Big Thompson Rivers. It includes forested areas along both sides of the Poudre Canyon and along the north and east sides of Rocky Mountain National Park. Smaller parts of the forest also extend into northern Gilpin and extreme northwestern Jefferson counties.