1959 Map of In-ko-pah Gorge

About this map

The San Diego and Imperial County line bisects this high desert landscape, where the jagged Jacumba Mountains drop toward the low desert floor. Transit history is deeply etched into the terrain, marked by the Stage Station Historical Marker near Mountain Spring and the steep descent through In-Ko-Pah Gorge. The map captures the infrastructure of the late 1950s, showing the Imperial Highway and a 4-lane stretch of highway winding toward Ocotillo.