Lolo National Forest is a national forest located in western Montana, United States with the western boundary being the state of Idaho. The forest spans 2 million acres and includes four wilderness areas; the Scapegoat and the Selway-Bitterroot Wilderness are partially within the forest while the Welcome Creek and Rattlesnake Wildernesses are solely in Lolo National Forest. The forest was created in 1906 from 4 different previous forests which were combined for administrative purposes.