The Tagliamento is a braided river in north-east Italy, flowing from the Alps to the Adriatic Sea at a point between Trieste and Venice. The source is in the Mauria Pass, on the border between the regions of Veneto and Friuli-Venezia Giulia. In the upper section, it flows through the historic Carnia region, in the northern part of the province of Udine. In the middle and lower sections, it first sets the boundary between the provinces of Udine and Pordenone and later between the former and the Province of Venice.