1990 Map of South Mountain

About this map

South Mountain dominates this portion of Malheur County, where the high desert landscape is defined by its vital water management systems and remote livestock ranching. The Malheur River cuts through the southern terrain, flanked by grazing lands like Hinkle Ranch and Perry Ranch. This 1990 provisional update shows a network of upland water sources essential for cattle and wildlife, including South Mtn Reservoir, Alfred Reservoir, and Tub Springs Reservoir. Narrow drainage systems like Black Canyon and Simmons Gulch illustrate the complex topography surrounding Hog Ridge. Scattered springs such as Coyne Spring and Gold Spring provide small, reliable water points in a territory where the South Fork Cottonwood Creek and Hog Creek shape the descent from the mountain peaks toward the river valley.