2017 Map of McMullen Basin

About this map

Sawtooth National Forest dominates this high-altitude landscape in Twin Falls County, where a complex network of seasonal drainages and mountain springs supports the regional cattle and wildlife ecology. The terrain is defined by dramatic depressions like McMullen Basin and Cottonwood Basin, separated by the prominent Cottonwood Ridge. This 2017 survey details a sophisticated system of water management, visible through numerous impoundments including Dry Fork Reservoir, Curtis Reservoir, and the Upper Burnt Cr Reservoir. These features, alongside named water sources like Moonshine Spring and Goat Springs, illustrate the vital importance of water rights and range management in this part of Idaho. Significant canyons and gulches, such as Squaw Joe Canyon and Hoppers Gulch, cut through the high country, while the course of McMullen Cr and Dry Cottonwood Cr trace the natural path of runoff through the basin floor.