The Arapaho and Roosevelt National Forests and Pawnee National Grassland are located in the north central part of Colorado.
Where is this Forest?


About the Forest

Scenic picture of Sawtooth mountain range with forest stand below and river Our Vision Statement

We celebrate the challenges and opportunity of managing change in an increasingly complex urban influenced Forest and Grassland.

We take pride in how:

  • Our decisions balance the use and protection of healthy ecosystems to respond to the diverse needs and values of the people we serve.
  • The deep attachment people feel for the land and resources is cultivated into cooperative and positive relationships to promote land stewardship and help deliver services.
  • Our innovative, quality oriented workforce embraces and reflects the diversity and sophistication of the people we serve.


The Arapaho National Forest was established by Theodore Roosevelt on July 1, 1908. The Roosevelt National Forest, originally part of the Medicine Bow Forest Reserve, was first named the Colorado National Forest in 1910 and was renamed by President Herbert Hoover to honor President Theodore Roosevelt in 1932. The Pawnee National Grassland was transferred to the Forest Service from the Soil Conservation Service in 1954. It was designated a national grassland in 1960.


Forest Supervisor Glenn Casamassa leads a team of four Staff Groups, five District Rangers and the Colorado Capital City Coordinator. The headquarters for the Arapaho and Roosevelt National Forests and Pawnee National Grassland, which is part of the Rocky Mountain Region, is located in Fort Collins, Colorado. Ranger District Offices are located in Boulder, Fort Collins, Granby, Greeley and Idaho Springs.

The USDA Forest Service is led by Chief Tom Tidwell with a national headquarters in Washington, D.C., the Forest Service operates through nine regions around the country. The Rocky Mountain Region is led by Regional Forester Dan Jiron.


The Rocky Mountain Research Station supports our natural-resource programs through relevant research and development of state-of-the-art management tools. The Fraser Experimental Forest is located on the Sulphur Ranger District of the forest.

Rules & Regulations

General rules for national forests and grasslands include details about camping, pets, firearms, permits and more.

Working With Others

Forest Service staff work with stakeholders of all types, including volunteers, teachers, groups, tribes, permittees, contractors and other agencies. The Arapaho and Roosevelt National Forests and Pawnee National Grassland (ARP) is the #1 recreation volunteer forest in the nation. New partnerships, such as the Front Range Fuels Treatment Partnership and the Arapaho and Roosevelt National Forests and Pawnee National Grassland Foundation, are a way for us to work with stakeholders and other agencies to further the vision of the ARP.