2015 Map of Willow Park Reservoir

About this map

Bighorn National Forest contains a complex network of high-elevation water management systems, as shown in this 2015 survey. The landscape is defined by the high basins that feed Willow Park Reservoir and Cloud Peak Reservoir, which are central to the region's hydraulic infrastructure. Significant engineering is evident in the Rock Cr and Piney Diversion Ditch, which reroutes natural flow across the drainage divides between S Piney Cr and other tributaries. Numerous smaller alpine bodies like Frying Pan Lake, Gem Lake, and the South Piney Lakes surround the larger reservoirs. The presence of Penrose Park and various creeks like Kearny Cr and Penrose Cr illustrate the drainage patterns of this mountain environment before it descends into the lower valleys of Johnson County.