The Dolomites (Italian: Dolomiti; German: Dolomiten; Friulian: Dolomitis) are a section of the Alps. They are locate 70% in the provinces of Belluno, the rest in the provinces of Bolzano-Bozen, and Trento (all in north-eastern Italy) and extend from the Adige river in the west to the Piave valley (Pieve di Cadore) in the east. The northern and southern borders are defined by the Puster Valley (Val Pusteria) and the Sugana Valley (Val Sugana).