Stretching about 1,000 kilometers (700 miles), the Sierra Madre Oriental is a range of folded mountains in northeastern Mexico. The mountain range runs adjacent to several large cities, including Monterrey (capital of Nueva León state) and Saltillo (capital of Coahuila state). The Sierra Madre Oriental is one of three main mountain ranges surrounding the Mexican Plateau, which covers much of northern and central Mexico. Each range bears the name “Sierra Madre”—Spanish for “Mother Mountain Range.” The Sierra Madre Occidental stands along the western side of the plateau, Sierra Madre del Sur lies to the south, and Sierra Madre Oriental stands on the east. The Sierra Madre Oriental connects with the Sierra Madre Occidental through the Trans-volcanic Mexican belt.