2019 Map of Ernst Valley

About this map

Big Bend National Park dominates this desert landscape, where the international boundary follows the winding course of the Rio Grande Wild and Scenic River. The terrain is defined by dramatic elevation changes, notably the towering Sierra del Carmen and the Sierra del Caballo Muerto. This 2019 survey documents the primitive network of the Strawhouse route as it navigates through the topographic depressions of Ernst Valley and the Ernst Basin. Sparse water sources like Ernst Tank highlight the arid environment of Brewster County. The map also traces significant drainages and ridges, including Telephone Canyon, Cow Canyon, and Hubert Ridge, providing a look at the geological formations that separate the United States from Mexico along the Marufo Vega trail region.