Continental Divide of the Americas
The Continental Divide of the Americas forms its western border in a series of three linear mountain ranges, and the divide forms the water divide as the northern border of the Playas Valley. The valley disappears southward into regions of the northwest Chihuahuan Desert of Chihuahua, Mexico. Regions of the desert extend northward to foothills of various mountain ranges, canyons, washes, or other landforms.