What is the main mountain range in eastern Mexico containing highest peak that begins south of Rio grande?

The main mountain range in eastern Mexico is the Sierra Madre Oriental. It begins south of the Rio Grande in the states of Coahuila and Nuevo Leon and runs south through the states of San Luis Potosi, Hidalgo, Puebla, and Veracruz before terminating in the state of Oaxaca. The Sierra Madre Oriental contains Mexico's highest peak, Pico de Orizaba, which is located in the state of Veracruz and has an elevation of 5,636 meters (18,491 ft) above sea level.