2023 Map of Porcupine Lake

About this map

Fall River and its accompanying irrigation works define the southern reaches of this landscape, where the Yellowstone Canal and Marysville Canal cut through the terrain to support regional agriculture. This area within the Targhee National Forest transitions from water-rich meadows like Bear Meadow to the sharp elevation changes of the Robinson Creek Breaks. The geography is shaped by a dense network of drainages, including Robinson Creek, Squirrel Creek, and Conant Creek, which flow through various draws and hollows. Transport in this part of Fremont County relies on established corridors like the Ashton-Flagg Ranch Rd and Falls River Ridge Rd, providing access to remote points such as Cave Falls and the secluded Porcupine Lake. The map illustrates the sophisticated water management systems required to navigate the high-country hydrology near the Idaho-Wyoming border.