The Tronto (Latin: Truentus) is a 115-kilometre long Italian river that arises at Monti della Laga and ends in the Adriatic Sea at Porto d Ascoli, San Benedetto del Tronto. It traverses the Lazio, Marche, and Abruzzo regions of Italy.
The source of the Tronto is in the Monti della Laga mountain range in the province of Rieti. Monte Gorzano is north of the source of the river and Lake Campotosto is south of the source of the river. The source of the river is near the place where the provinces of Rieti, Teramo, and L Aquila meet.
