Ottawa National Forest was created in 1931.
The area of Ottawa National Forest is 4,046.856 square kilometers.
Ottawa National Wildlife Refuge was created in 1961.
Wayne National Forest was created in 1992.
Prescott National Forest was created in 1908.
Boise National Forest was created in 1908.
Kaibab National Forest was created in 1909.
Bighorn National Forest was created in 1897.
Arapaho National Forest was created in 1908.
Sequoia National Forest was created in 1908.
Kaniksu National Forest was created in 1908.
Ocala National Forest was created in 1908.
Sierra National Forest was created in 1893.