2020 Map of Allan Mountain

About this map

The Montana-Idaho state line divides this high-elevation landscape, where the Bitterroot National Forest meets the Salmon National Forest. Central to this area is Allan Mountain, a prominent peak situated above Allan Lake and the drainages of Ditch Creek. The terrain is defined by steep ridges and natural water sources, including Bear Wallow Spring and Indian Spring. Historically, access was facilitated by routes such as the Ax Park Cutoff and the Butcher Knife Ridge trail, which trace the natural contours of the divide between Ravalli and Lemhi counties. The map details a complex network of forest development roads, including Nat For Dev Rd 091, that provide access to remote landmarks like Salzer Bar along Hughes Creek. This survey provides a modern look at the unchanged drainage patterns of Humbug Creek and Burrell Creek near the state border.