 The river rises from resurgences in the hills to the southeast of the Lago di Garda and its former lower course had roughly followed what is currently the lower course of the Adigetto Canal until the breach at Pinzone in the 10th century.Since the breach at Pinzone the lower course of the Tartaro has roughly followed what was the former lower course of the Mincio river and, probably, of the ancient Adria river.After the breach at Ficarolo in 1152 the Po river diverted to the north and the Tartaro river became one of its tributaries.