The Magdalena River (Spanish: Río Magdalena), also called Yuma River (Spanish: Río Yuma ) is the principal river of Colombia, running about 1,540 kilometres (950 miles) from South to North through the western half of the country. It takes its name from the biblical figure, Mary Magdalene. It is navigable through much of its lower reaches. It flows through the Magdalena River Valley.
Its headwaters are in the South of the country, where the Andean subranges Cordillera Central and Cordillera Oriental separate, in Huila Department. The river then runs east of north in a great valley between the two cordilleras. It reaches the coastal plain at about nine degrees north, then runs east for about 100 kilometres, then north again, reaching the Caribbean Sea at the city of Barranquilla in the zone known as Bocas de Ceniza.