2020 Map of Twelvemile Reservoir

About this map

Twelvemile Reservoir serves as a central landmark in this high-desert landscape near the border of Crook and Harney Counties. The terrain is defined by a network of drainage systems and prominent volcanic formations, including the Grindstone Rim and several named peaks like Speckle Butte and Wade Butte. Water sources such as Mayme Spring and Roland Lake indicate the critical role of seasonal hydrology in this arid region, where intermittent flows like Black Snag Cr and Norcross Cr carve through the land. The presence of Price-Twelvemile Rd and Berger-Feely Rd suggests a landscape managed for range or resource access rather than dense settlement, reflecting the isolated ranching and geographic character of Central Oregon in the early twenty-first century.