2013 Map of Powderhorn Gulch

About this map

The Salmon National Forest defines the eastern portion of this Idaho landscape, where the high mountain terrain transitions into a complex system of drainage basins. The area is characterized by significant topographical relief, illustrated by the deep cuts of Powderhorn Gulch and Perk Canyon. Water distribution is central to the layout of the land, with Eighteenmile Cr and Clear Cr carving paths across the southern and central sections. Transportation in this part of Lemhi County is limited to primary corridors like Eighteen Mile Rd and Perk Canyon Rd, reflecting the remote and managed nature of these public lands. Small seasonal drainages such as Bull Cr and Divide Cr further detail the watershed, providing clear landmarks for those studying the natural geography and land management boundaries of the early 21st century.