2020 Map of Ross Lake

About this map

Ross Lake and the intermittent drainages of Owyhee County define this high-desert basin in the state's southwestern corner. The landscape is characterized by a complex network of seasonal water storage and drainage, notably Ross Slough and several managed impoundments such as Yatahoney Reservoir Number 1 and Yatahoney Reservoir Number 2. These features, along with Henry Lake and Juniper Lake, illustrate the vital role of water management in a region where geographic names like Pleasant Valley and Mud Flat hint at the varying terrain. The map also records the presence of 903 Bia, a Bureau of Indian Affairs route, cutting through the southeastern sections. This survey provides a precise view of how modern ranching or land management infrastructure, including Willies Reservoir and Millin Reservoir, is overlaid upon the natural courses of Yatahoney Cr and Shoofly Cr.