The Running of the Bulls is an annual event that draws thousands to Pamplona, Spain, every year. Ander Gillenea/AFP/Getty Images)

Mornings in Pamplona, Spain, become especially exciting one particular week in July every year, when the renowned fiestas of San Fermin are held and the famed Running of the Bulls winds through the cobblestone streets of Pamplona's old quarter.

The Running of the Bulls, also known as the Encierro, is held annually from July 7 to July 14. It starts when the clock of the church of San Cernin strikes 8 a.m., and six fighting bulls, along with steers, are released from a corral. For a few breathless minutes, they charge after runners over a course that winds over 825 meters (approximately 902 yards) before the thundering bovines reach their final destination, a bull ring.

Participants run with Fuente Ymbro's bulls as they arrive at the bull ring during the fourth Encierro, or bull-run, of the San Fermin Festival in Pamplona, Spain, July 10, 2015. Ander Gillenea/AFP/Getty Images

Injuries are more or less inevitable, given the nature of the event. At least 14 people have died in the event since 1924, Time magazine reported. Many more have been injured when they are crushed by animals or other runners. This year, four people were gored the fifth day of the event alone, the BBC reported.

The third Encierro of the San Fermin Festival, on July 9, 2015. The festival attracts thousands of tourists to watch the bull runs despite heavy condemnation from animal rights groups. Ander Gillenea/AFP/Getty Images

The festival dates back at least to 1592 -- although it may have begun as early as the 13th century -- as a way to herd bulls from a corral into a ring. The event was made famous by Ernest Hemingway's classic, "The Sun Also Rises."

Revelers run with the Victoriano del Rio Cortes' fighting bulls along Estafeta Street on the fourth day of the San Fermin Running of the Bulls festival on July 9, 2015, in Pamplona, Spain. David Ramos/Getty Images

This year's bull run in Pamplona ended Tuesday with no deaths but 10 injuries, among them four Americans. In the last run, one bull alone managed to knock down nearly a dozen people. In separate bull runs in festivals elsewhere in Spain, three people have died this summer, the New York Post reported.

An injured runner is taken away by medical staff as carpenters remove the bull run barrier after the last running of the bulls of the San Fermin festival in Pamplona, July 14, 2015. Five runners were hospitalized following the run that lasted two minutes and four seconds, according to local media. Reuters/Susana Vera

During the final run in Pamplona this year, five bull runners were hospitalized in a sprint that lasted just over two minutes, local media said, according to Reuters.

A wild cow charges at a reveler after the last running of the bulls of the San Fermin festival in Pamplona, July 14, 2015. Reuters/Joseba Etxaburu

Those under the age of 18 are not allowed to run or participate, according to the official site for the Running of the Bulls.