Grijalva River
The Depresión Central consists of a drainage basin some long and varying in width from . The Grijalva River is fed by drainage from the Cuchumatanes mountains of Guatemala and from both of the Chiapas highland regions, particlularly the Sierra Madre. The wide plains feature a hot climate with moderate rainfall. The Depresión Central is itself divided into two zones, the eastern is the Grijalva Valley stretching from the Guatemalan border to the Sumidero Canyon; the western zone is the Meseta Central, or Central Plateau, in colonial times referred to as the Valle de Jiquipilas y Cintalapa. This region of high plains blocks the passage of the Grijalva River, which has cut its way through towards Tabasco by means of the Sumidero Canyon. Los Chimalapas is another highland region at the northern extreme of the Meseta Central and bordering with Oaxaca; it is considered the first upthrust of the Sierra Madre.