2016 Map of Ernst Valley

About this map

The Rio Grande snakes along the international border in this 2016 survey, forming the eastern edge of Big Bend National Park. This arid landscape is dominated by the steep escarpments of the Sierra del Caballo Muerto and the dramatic relief of Hubert Ridge. The map details a primitive network of roads and drainage patterns, including the prominent Arroyo Venado and the secluded Telephone Canyon. Within the southern section, Ernst Valley and Ernst Basin provide a clear view of the complex topographical features and seasonal water sources like Ernst Tank. This area is further protected as part of the Rio Grande Wild and Scenic River, highlighting its significance for conservation and remote wilderness research.