Calatayud is a Spanish Denominación de Origen (DO) for wines located in the southwestern corner of the province of Zaragoza (Aragón, Spain) about 90 km from Zaragoza and covers over 5,600 ha, extending over 46 different municipalities, including Calatayud itself. It borders with the Cariñena (DO) in the east and with the province of Soria in the west. It is in the valley of the River Ebro and is crisscrossed by many other rivers including the Jalón, Jiloca, Manubles, Mesa (river), Piedra and Ribota. The vineyards are to be found on the south facing slopes of the Sierra de la Virgen range at heights of between 550 m and 800 m above sea level. Calatayud achieved DO status in 1990 and it became Aragon’s second largest quality wine-producing region after Cariñena.