2019 Map of Shumla

About this map

The Rio Grande and the Pecos River define the stark geography of this borderland region, where the two major waterways converge within the Amistad National Recreation Area. By the early twenty-first century, the landscape reflects the deep impact of the Amistad Reservoir, which has flooded portions of the canyon floor, creating distinctive features like Shumla Bend. The rugged limestone breaks are deeply incised by numerous side drainages, most notably Painted Canyon, Lewis Canyon, and Shackelford Canyon. This survey captures the international boundary as it follows the sinuous path of the river, marking the transition between the United States and Mexico. The terrain here is dominated by the complex network of arroyos and the high desert plateaus that drop sharply toward the river valleys.