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Coahuila Mexico Geography

Sierra Madre Oriental

Geography of Coahuila covers the Sierra Madre Oriental which runs northwest to southeast through the State, and the higher elevations are home to the Sierra Madre Oriental pine-oak forests. The northernmost fingers of the Sierra Madre Oriental, the Sierra del Burro and the Sierra del Carmen, reach to the border with the United States at the Rio Grande.

East of the range, the land slopes gently toward the Rio Grande, and is drained by several rivers, including the Salado and its tributary, the Sabinas River. The Tamaulipan mezquital, a dry scrublands Eco region, occupies the eastern portion of the State, and extends across the Rio Grande into southern Texas.

Bolsón de Mapimí

The portion of the State west of the Sierra Madre Oriental lies on the Mexican Plateau, and is part of the Chihuahuan Desert. The Bolsón de Mapimí is a large endorheic basin which covers much of the western portion of the State and extends into adjacent portions of Chihuahua, Durango, and Zacatecas.

Nazas River Mexico

The Nazas River, which flows east from Durango, and the Aguanaval River, which flows north from Zacatecas, empty into lakes in the Bolsón. Torreón, the most populous city in the State with 650,000 residents, lies on the Nazas in the irrigated Laguna Region, the (Comarca Lagunera), which straddles the border of Coahuila and Durango.