2015 Map of In-Ko-Pah Gorge

About this map

The Jacumba Mountains dominate this arid landscape, where steep elevation changes are carved by a complex network of dry washes and canyons. This 2015 U.S. Geological Survey topographic map documents the transition between the high desert peaks and the lower basins of Imperial County. Modern infrastructure is concentrated along the northern and western corridors, specifically where the In-Ko-Pah Gorge provides a natural, albeit challenging, passage for transportation. The settlement of Boulder Park sits near the San Diego County line, serving as a gateway to the high country. In the northeast, the terrain levels out near the Emory Ranch Airport and the edge of Ocotillo. Researchers can trace the alignment of historical transit routes, including Old Highway 80 and the Evan Hewes Hwy, as they navigate the dramatic slopes of Devils Canyon and the surrounding desert valleys like Davies Valley.