Minho river is the longest river in Galicia. This river length is 340 kilometres. Minho river receives water of his main tributary, the Sil. This river divides Spain and Portugal.   Sources: Wikimedia Commons contributors, “File:Minho River map.png,” Wikimedia Commons, the free media repository, https://commons.wikimedia.org/w/index.php?title=File:Minho_River_map.png&oldid=295134641 (accessed May 23, 2019). Wikimedia Commons contributors, “File:Foz do Minho … More Minho River