Festivities of Grañén Activity · Grañén, Los Monegros, Huesca Image of Grañén, not of the place itself. The fiesta mayor of Grañén is celebrated on 25 July in honor of Santiago Apóstol, patron saint of the town, with the opening address from the town hall balcony, a float parade and a popular race. Photo: Marcos Maté Luna (Ordunte) (CC BY-SA 3.0) What to see and do in Grañén