A competitor in the carting category of the Henrik Sečnik dog mushing race in Hraše, Slovenia on April 8, 2024. Over 100 dogs and their owners from Slovenia and abroad competed in the 10th edition of this international race. (Photo by Luka Dakskobler/SOPA Images/Rex Features/Shutterstock)

Horse racing is part of Naadam, a festival organized every July in Mongolia to celebrate the People’s Revolution. Using children as jockeys in such races has a centuries-long tradition. Boys and girls as young as 5 (although the law imposes a minimum age limit of 7) ride in races that can be dangerous, with hundreds of horses running across the steppe at distances of 12 to 28 kilometres at great speeds. (Photo by Tomasz Gudzowaty)

Marcelo Gutierrez of Colombia in action during the Valparaiso mountain bike downhill race in Valparaiso, Chile on February 11, 2018. Runners from around the world participated in the mountain bike race on the streets of the port. (Photo by Rodrigo Garrido/Reuters)

A canine chase a target during a racing competition on the outskirts of Charsadda on January 14, 2024. (Photo by Abdul Majeed/AFP Photo)

Spectators react as a competitor races past in the annual donkey festival in Salcedo, Ecuador, Saturday, September 10, 2022. (Photo by Dolores Ochoa/AP Photo)

Competitors line up their boats for some formalities during the Aberdeen Dragon Boat Races. (Photo by Jessica Hromas)

The Running of the Wieners races are the annual kickoff to Oktoberfest-Zinzinnati. 100 dachshunds race to be crowned the winning wiener at the seventh-annual Hillshire Farm Running of the Wieners on Friday, September 19, 2014. (Photo by Jay Murdock)

Remi Bizouard races at the Night of the Jumps freestyle motocross acrobatics at O2 arena on March 16, 2012 in Berlin, Germany. (Photo by Carsten Koall/Getty Images)