Río Cauto is the longest river in Cuba, stretching approximately 343 kilometers. It flows through the eastern part of the island, starting in the Sierra Maestra mountains and emptying into the Gulf of Guacanayabo. The river is an important water source for the surrounding communities and supports local agriculture. The river's basin is rich in biodiversity, providing habitats for various species of flora and fauna. Additionally, Río Cauto plays a significant role in the region's economy, as it is used for irrigation and fishing. Its waters are also vital for maintaining the ecological balance in the area.