2015 Map of Big Maria Mountains NE

About this map

The Colorado River carves a dramatic boundary through this desert landscape, separating the rugged elevations of the Riverside Mountains in California from the alluvial plains of Parker Valley in Arizona. This 2015 survey captures the transition from high-relief terrain at Quien Sabe Point to the riparian bottomlands where geographic features like Barrie Island and Hall Island define the river's path. While the western portion of the map is dominated by mountain slopes, the eastern side shows the beginnings of local infrastructure with roads such as Hidden Valley Rd and N Peterson Rd. The drainage patterns of the area are clearly marked by the prominent Big Wash and the distinctively named Slaughter Tree Wash, providing a clear look at how water shapes this arid border region.