2017 Map of Southeast Harney Lake

About this map

Harney Lake and the seasonally fluctuating Mud Lake define this high desert basin in the Malheur National Wildlife Refuge vicinity. The landscape is shaped by terminal drainage patterns, where Jackass Cr feeds into the alkaline flats and Lynch Spring emerges near the northern edge of the map. Between the water bodies, the Sand Gap provides a natural corridor through the terrain, while the vast Weed Lake Flat suggests the reach of ancient lake beds. The sparse road network, including S Harney Rd and Catlow Rd, follows the contours of the basin floor, serving as the primary infrastructure for this ranching and conservation landscape. This 2017 survey details the complex hydrography of a region where water availability dictates the movement of both people and wildlife.