The festival of San Fermín is a week-long, historically rooted celebration held annually in the city of Pamplona . The celebrations start at noon on the sixth of July, when the opening of the party is marked by setting off the pyrotechnic chupinazo,and continue until midnight, on the fourteenth of July, with the singing of the Pobre de Mí. While its most famous event is the encierro, or the running of the bulls, which happens at 8:00 AM from the 7th of July to the 14th July.

The festival involves many other traditional and folkloric events. It is known locally as Sanfermines and is held in honor of Saint Fermin, the co-patron of Navarre. Its events were central to the plot of The Sun Also Rises, by Ernest Hemingway, which brought it to the general attention of English-speaking people. It has become probably the most internationally renowned fiesta in Spain. Over 1,000,000 people come to participate in this festival.