2011 Map of Powderhorn Gulch

About this map

Eighteenmile Creek and its namesake road define the drainage patterns of this Lemhi County landscape, where water and transit have long followed the natural contours of the high valleys. The topography is marked by significant drainages including Clear Creek and Tenmile Creek, which feed into the larger riparian system. Access to this territory is provided by rugged paths such as Perk Canyon Rd, tracing through the notable landforms of Perk Canyon and Powderhorn Gulch. This map serves as a detailed record of the hydrography and basic infrastructure in the early 21st century, illustrating how secondary routes like Eighteen Mile Rd bridge the gap between mountain ridges and creek beds.