Грихальва
The Selegua River has its source in the Sierra de los Cuchumatanes and flows northwards, crossing the border into Chiapas, where it joins the Cuilco River to form the Grijalva River, to flow onwards to the Gulf of Mexico. Its principal tributaries are the Pino, Sibilá, Ocubilá, Naranjo, Colorado, Torlón, Mapá and Chicol rivers.