Spain's famous San Fermin bull running festival is held annually from July 6 to 14 in commemoration of the city's patron saint. Hundreds of thousands of visitors from all over the world attend the fiesta. Many of them physically participate in the highlight event - the running of the bulls, or encierro - where they attempt to outrun the bulls along a route through the narrow streets of the old city. See the pictures of this extraordinary festival.
Spain's famous San Fermin bull running festival
Running of the bulls, a 400-year-old tradition, takes place each year from July 6 to 14 during the San Fermin festival in Pamplona
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Several thousand people celebrate during the traditional firing of the 'chupinazo' that marks the beginning of the Festival of San Fermin at City Hall Square in downtown Pamplona, Spain
© EPA-EFE/Jesus Diges People run next to fighting bulls from the Cebada Gago ranch and steers during the third day of the running of the bulls at the San Fermin Festival in Pamplona, Spain
© AP Photo/Alvaro Barrientos Revellers from around the world flock to Pamplona every year to take part in the eight days of the running of the bulls
© AP Photo/Alvaro Barrientos People on balconies wait for the start on the running of the bulls at in Pamplona
© AP Photo/Alvaro Barrientos The festival, locally known as Sanfermines, is held annually from 6 to 14 July in commemoration of the city's patron saint
© EPA-EFE/VILLAR LOPEZ Hundreds of thousands of visitors from all over the world attend the fiesta. Many of them physically participate in the highlight event - the running of the bulls, or encierro - where they attempt to outrun the bulls along a route through the narrow streets of the old city
© AP Photo/Alvaro Barrientos A group of musicians play with glasses of liquor at their feet, at the San Fermin Festival in Pamplona
© AP Photo/Alvaro Barrientos A reveller lies on a stretcher after getting hurt during the third day of the running of the bulls in Pamplona
© AP Photo/Alvaro Barrientos Children enjoy the traditional 'txiki' run (a San Fermin Bull Run for kids) in Pamplona
© EPA-EFE/JESUS Revellers run next to fighting bulls from the Fuente de Ymbro bull ranch as they enter the bullring during 4th day of the running of the bulls in Pamplona
© AP Photo/Alvaro Barrientos