The Salado River is a river that crosses several provinces of Argentina, flowing 1,150 kilometres (710 mi) from its source in the Salta Province to end in the Paraná River, in the Santa Fe Province. Because its origin, its flow varies widely within the year, and it can dry out in some parts of its path during the winter. The only important tributary to the river is the Horcones River, which is born in Salta as Cajón River, and joins the Salado in the Santiago del Estero Province.