2017 Map of Twelvemile Reservoir

About this map

Grindstone Rim and Walker Ridge dominate this high-desert landscape in central Oregon, where water management is central to the land's utility. The drainage of Grindstone Cr and Twelvemile Cr feeds several catchments, most notably the Twelvemile Reservoir and Lillard Reservoir. This 2017 survey illustrates a region defined by its hydrography and terrain rather than human settlements, with the boundary between Crook Co and Harney Co cutting through the eastern portion of the map. Road networks like Price-Twelvemile Rd and Grindstone Rd follow the natural contours of the land, providing access to remote features such as Mayne Spring and Roland Lake. These intermittent water sources and small reservoirs represent the essential infrastructure for ranching and resource management in this arid environment.