2017 Map of Inkom

About this map

Inkom and Blackrock sit within a dramatic topographic corridor defined by the Pocatello Range and the winding Portneuf River. This landscape is marked by the transition from river valley floors to the high elevations of the Caribou National Forest, where peaks like Chinese Peak and Indian Mtn rise above deep drainage systems such as Blackrock Canyon and Caddy Canyon. The map details the hydrology of the region, featuring numerous named water sources like Fort Hall Spring, Munn Spring, and Morris Canyon Spring, which supported the early development of these southeast Idaho communities. The alignment of W Old Highway 91 and modern transit routes through the valley demonstrates how the natural gap between the mountains has dictated regional movement for generations, connecting Portneuf to the wider valley floor.