1969 Map of Cottonwood Peak

About this map

The Portneuf Range dominates this late-1960s survey of the high country along the boundaries of Bannock, Caribou, and Franklin counties. Centered on the prominence of Cottonwood Peak, the landscape is defined by a dense network of drainages and canyons that supported early agricultural irrigation, most notably via the Treasureton Canal and Cottonwood Creek. The map documents a transition in land use, showing a topography carved by Mill Canyon and Bullwhacker Canyon alongside numerous named water sources like Time Spring and Dempsey Creek. A primitive transport network consisting of several labeled Jeep Trails provides access to remote landmarks such as Hog Wallow and the livestock-related Lewis Creek. This detailed topographical study illustrates the importance of water management in the Cottonwood Valley during a period of steady ranching and agricultural activity in southeastern Idaho.