Sinú River (or Río Sinú in Spanish), is a river in northwestern Colombia that flows mostly through the Coroba Department and into the Caribbean Sea. The river is the third most important river after the Magdalena River and the Cauca River in the Caribbean Region. It is born in the Antioquia Department flowing south to north for 415 km until flowing into the Caribbean Sea. The river is navigatable for only half of its length, 200 km starting in Montería the largest city in its basin.