 South of the isthmus of Tehuantepec, the Sierra Madre de Chiapas runs 280 kilometers along the Pacific Coast from the Oaxaca-Chiapas border to Mexico's border with Guatemala.Although average elevation is only 1,500 meters, one peak—Volcán de Tacuma—exceeds 4,000 meters in elevation.Finally, the Meseta Central de Chiapas extends 250 kilometers through the central part of Chiapas to Guatemala.