2011 Map of Slumgullion Pass

About this map

Slumgullion Pass serves as the central geographic marker for this arid Yuma County terrain, where the landscape is defined by its drainage patterns and water catchment points. The prominent elevations of Thumb Peak and Thumb Butte dominate the southern portion of the sheet, providing significant landmarks for navigation in the open desert. The intermittent water network is centered on Gravel Wash, which cuts through the northwestern quadrant. Local ranchers and travelers in this part of Arizona relied on scattered water resources such as Castle Rock Tank, Blue Rock Tank, Chain Tank, and Red Tank. These catchment features, along with Tinaja Sega, represent the vital infrastructure of the high desert, marking the few points where water might be found or stored in an otherwise parched environment.