2013 Map of McCammon

About this map

McCammon serves as the central hub of this Idaho landscape, where the Portneuf River and Marsh Cr converge within the wide expanse of Marsh Valley. The settlement pattern follows the valley floor, with the small community of Onyx situated to the north along the river's winding course. This 2013 survey illustrates a complex water management system, notably the Portneuf Marsh Valley Canal, which skirts the eastern edge of the valley near the base of the rising Portneuf Range. To the east, the terrain climbs sharply into the Caribou National Forest, a region defined by deeply cut drainages such as Robbers Roost Cr, Twomile Cr, and Harkness Cr. The map details the transition from the irrigated agricultural lands of the valley to the protected forest highlands, providing a clear view of the road network including S Old Highway 91 and various canyon access points like Mullen Canyon.