1903 Map of Cerro Alto

Evidence of early ranching and transit through the desert is marked by a series of water catchments, including Sparrow Tanks, Coyote Tanks, and the specifically noted Abandoned Tanks along Rockhouse Draw. To the northeast, the Cornudas Mts rise toward the state line, anchored by Mt San Antonio. The presence of Padre Mine Canyon suggests early mineral exploration in these limestone peaks, while the reliance on ephemeral water sources like Buckhorn Draw highlights the vital importance of natural and man-made tanks for anyone traversing this high-altitude basin.