2020 Map of Long Tom Reservoir

About this map

The Boise National Forest covers much of this high-altitude landscape in Elmore County, dominated by the sharp elevation changes of the Danskin Mountains and Danskin Ridge SE. Centrally located, the Long Tom Reservoir sits at the confluence of several mountain drainages, including Long Tom Creek and West Fork Long Tom Creek. The map documents a complex network of historic and modern routes, from the NE Immigrant Rd in the southwest to the Long Tom (Dixie Cutoff) trail. This area highlights the transition from managed forest lands to open grazing areas like Little Sage Hen Flat and Sproule Flat, which are interspersed with vital water sources such as Montrose Spring and Berneathy Spring. The South Fork Boise River cuts through the northern sections, creating a steep canyon environment near Indian Point.