The Idaho Panhandle National Forests are a jointly administered set of three national forests located in the U.S. state of Idaho. Approximately 22.4% of the forest (in the Kaniksu portion) extends into the states of Montana (14.1%) and Washington (8.3%). The IPNF were created in 2000 to administer three separate national forests that continue to manage themselves somewhat separately through district offices. The Coeur d'Alene, St. Joe, and Kaniksu National Forests together occupy 3,224,739-acre (5,038.66 sq mi, or 13,050.06 km2)  in northern Idaho (better known as the Idaho Panhandle). The northernmost portion of the IPNF share a boundary with Canada. Its headquarters are located in Coeur d'Alene, Idaho.
Ferguson, D.E. and A.C. Zack. (2006). Establishment record for the Wellner Cliffs Research Natural Area: Priest River Experimental Forest, Idaho Panhandle National Forests, Bonner County, Idaho [RMRS General Technical Report GTR-170WWW]. Fort Collins, CO: U.S. Dept. of Agriculture, U.S. Forest Service, Rocky Mountain Research Station.