The Gilão (Portuguese pronunciation: [ʒiˈlɐ̃ũ̯]) is a river in southern Portugal. It is approachable from the Atlantic Ocean, where it enters at the town of Tavira in the Algarve, 35 kilometres (22 mi) east of Faro. The river Gilão changes its name to Rio Séqua at the ancient bridge named Ponte Romana in the center of Tavira. The river's source is located in the Serra do Caldeirão mountains of the central Algarve, at the confluence of the Asseca, Zimbral and Alportel rivers, the latter rising north of São Brás de Alportel.