2017 Map of Porcupine Coulee

About this map

Split Shack Spring provides a rare point of water in this part of Phillips County, where the landscape is defined by the deep incisions of numerous seasonal drainage channels. The area is characterized by these distinct landforms, including Rattlesnake Coulee and Corral Coulee in the north, and Poplar Coulee further south. The map illustrates a remote grazing or ranching landscape where human presence is marked primarily by sparse rural routes like Turkey Track Rd and Frenchman Rd. The concentration of named drainages like Porcupine Coulee and Ash Coulee suggests a terrain where topography and the intermittent flow of water dictated the placement of roads and early ranching boundaries in the Big Sky Country.