The festival, held in honor of one of the two patron saints of Navarre, takes place from July 7 to July 14.
Spanish "rejoneador" (mounted bullfighter) Pablo Hermoso de Mendoza performs during a bullfight at the San Fermin festival in Pamplona, northern Spain, July 6, 2017
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© AP Photo / Alvaro Barrientos
Thousands of tourists flock to Pamplona from all over the world to take part in the festival.
Revelers sit on the bull run barrier before the first running of the bulls at the San Fermin festival in Pamplona, northern Spain, July 7, 2017
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© AP Photo / Alvaro Barrientos
Revelers run in front of Fuente Ymbro's fighting bulls during the running of the bulls at the San Fermin Festival, in Pamplona, northern Spain, Monday, July 10, 2017
Participants hold red scarves as they celebrate the 'Chupinazo' (start rocket) to mark the kickoff at noon sharp of the San Fermin Festival, in front of the Town Hall of Pamplona, northern Spain, on July 6, 2017
The festival became probably the most famous Spanish fiesta in the world after the publishing of a novel by Ernest Hemingway called The Sun Also Rises in 1926.
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© AP Photo / Alvaro Barrientos
Running of the bulls is probably the most famous element of the San Fermin festival.
Revelers at the San Fermin Festival in Pamplona.
A reveler is tossed by an angry bull following the third running of the bulls at the San Fermin festival in Pamplona, Spain July 9, 2017
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© AP Photo / Alvaro Barrientos
People react as revellers running in front of Victoriano del Rio's fighting bulls are entering at the bullring at the end of the running of the bulls at the San Fermin Festival, in Pamplona, northern Spain, Wednesday, July 12, 2017
An angry bull leaps over revelers as it enters the bullring following the seventh running of the bulls at the San Fermin festival in Pamplona, northern Spain, July 13, 2017
The running of the bulls is a very dangerous and potentially lethal activity; while fatalities are not common, they are not unheard of either.
A street vendor wears hats in traditional festival colours on the first day of the San Fermin festival in Pamplona, Spain, July 6, 2017
Revelers run from the Fire Bull, a man carrying a bull figure packed with fireworks, at the San Fermin festival in Pamplona, northern Spain, July 7, 2017
