2023 Map of Shumway Reservoir

About this map

High desert water management defines this portion of Malheur County, where a complex network of small reservoirs and named springs supports livestock and wildlife in a demanding landscape. Shumway Reservoir sits centrally, reached by the Shumway Ranch Rd and the Shumway Cutoff Rd. The topography is marked by significant drainages such as Cottonwood Creek and Granite Creek, which channel seasonal runoff between elevated features like Lake Ridge and Spear Head Reservoir. The small settlement at Creston and the Sexton Reservoir anchored the southern reaches of this survey. Numerous family-named or descriptive water sources, including Arrien Reservoir and Brass Cap Reservoir, illustrate the historical necessity of capturing every available spring and creek flow to sustain ranching operations across these basins.