Running through it all, the Rio Grande carries a federal Wild and Scenic River designation — a congressional recognition of its outstanding natural, cultural, and recreational values. The Lower Canyons, accessible only by river, is one of the most remote stretches of waterway in the continental United States.
Photo credits: Big Bend by Laiken Jordahl/Center for Biological Diversity; Rio Grande/Big Bend by Laiken Jordahl/Center for Biological Diversity; Gambels quail by Dominic Troiani.