The Grijalva River is a significant waterway located in southern Mexico. It flows through the state of Chiapas and is approximately 240 kilometers long. The river is known for its stunning landscapes, including canyons and lush vegetation, and it plays a crucial role in the region's ecology and economy. The river originates in the Sierra Madre de Chiapas mountains and eventually merges with the Usumacinta River. The Grijalva is also home to several important hydroelectric dams, such as the Peñitas Dam, which contribute to the local energy supply and support agricultural activities in the area.