The Marathon is a long-distance foot race with an official distance of 42.195 kilometers (26.22 miles). The marathon was one of the original modern Olympic events in 1896, though the distance did not become standardized until 1921. Half the distance of a marathon is called a Half-Marathon or a marathon with a distance of 21,097.5 meters (13.11 miles). A Triathlon is a multi-sport endurance event consisting of swimming, cycling, and running in immediate succession over various distances.
Even though some events listed here are less than 42 kilometers (Just a 5K or 10K run), we’re still loosely defining it as a marathon event. .