2015 Map of Carter Reservoir

About this map

The Applegate Trl cuts through this high desert terrain, marking a historic corridor of western migration across the border of Modoc and Washoe Counties. This arid landscape is defined by its critical water sources, including the expansive New Year Lake to the north and Carter Reservoir near the center. The presence of numerous watering points like Big Spring, Juniper Spring, and Willow Springs illustrates the vital infrastructure required for travel and ranching in this portion of the Great Basin. To the southeast, the topography rises toward Metzker Peak, overlooking the broad expanse of Long Valley. The map also delineates the precise boundary between California and Nevada, showing how the state line bisects these remote volcanic plateaus and seasonal basins such as Mud Lake.