Grijalva River, formerly known as Tabasco River. (Spanish: Río Grijalva, known locally also as Río Chiapa and Mezcalapa river) is a 480 km long river in southeastern Mexico. It is named after Juan de Grijalva who visited the area in 1518. The river rises in Chiapas highlands and flows from Chiapas to the state of Tabasco through the Sumidero Canyon into the Bay of Campeche.