Eliud Kipchoge is a Kenyan long-distance runner who competes in the marathon and formerly specialized in the 5000 metres. Regarded as one of the greatest marathon runners of all time, he is the 2016 and 2020 Olympic marathon champion, and was the world record holder in the marathon from 2018 to 2023, with a time of 2:01:09 set at the 2022 Berlin Marathon, until that record was broken by Kelvin Kiptum at the 2023 Chicago Marathon with a time of 2:00:35. He has run four of the 10 fastest marathons in history.

The marathon is a long-distance foot race with a distance of 42.195 km, usually run as a road race, but the distance can be covered on trail routes. The marathon can be completed by running or with a run/walk strategy. There are also wheelchair divisions. More than 800 marathons are held throughout the world each year, with the vast majority of competitors being recreational athletes, as larger marathons can have tens of thousands of participants.