A half marathon is a road running event of 21.0975 kilometres —half the distance of a marathon. It is common for a half marathon event to be held concurrently with a marathon or a 5K race, using almost the same course with a late start, an early finish or shortcuts. If finisher medals are awarded, the medal or ribbon may differ from those for the full marathon. The half marathon is also known as a 21K, 21.1K, or 13.1 miles, although these values are rounded and not formally correct.
The Prague Marathon is an annual road marathon held in the city of Prague in the Czech Republic each May. It was founded in 1995 and has grown to become a significant event, being awarded IAAF Gold Label status. Prague's marathon course has been voted one of the most beautiful in the world.
The 10K run is a long-distance road running competition over a distance of ten kilometres. Also referred to as the 10K road race, 10 km, or simply 10K, it is one of the most common types of road running event, alongside the shorter 5K and longer half marathon and marathon. It is usually distinguished from the 10,000 metres track running event by stating the distance in kilometres, rather than metres.
Mary Jepkosgei Keitany is a Kenyan former professional long distance runner. She is the world record holder in a women-only marathon, having won the 2017 London Marathon in a time of 2:17:01. As of November 2022, she placed fifth on the world all-time list at the marathon and eleventh on the respective world all-time list for the half marathon.
Ras Al Khaimah Half Marathon is an annual half marathon held in Ras Al Khaimah, United Arab Emirates.
Atsedu Tsegay Tesfay is an Ethiopian professional long-distance runner. In 2012, he won Prague Half Marathon in a time of 58:47 — the best half marathon performance of the year and an Ethiopian record.
The Prague Grand Prix is an annual running event which takes place in September in Prague, Czech Republic. It is a 10-kilometre race organised in the attractive surroundings of Prague city centre during evening twilight. The race was introduced in 1996 as the O2 Prague Grand Prix, and is a part of the RunCzech running circuit. The event holds IAAF Gold Label Road Race status.
The Valencia Half Marathon is an annual half marathon road running event held in Valencia, Spain, since 1988. It is categorized as a Gold Label Road Race by World Athletics. The race is organised by the Valencian sports club SD Correcaminos, which also organises the annual Valencia Marathon.
In 2015, the foremost athletics event was the 2015 World Championships in Athletics in Beijing. The two other major global level competitions in 2015 are the World Cross Country Championships and the IAAF World Relays.
Netsanet Gudeta Kebede is an Ethiopian long-distance runner who competes in road running and cross country running events. She was the bronze medallist at the IAAF World Cross Country Championships in 2015. She shared in the team title at that competition and also won team silver at the IAAF World Half Marathon Championships in 2014. Her best for the half marathon is 66:11 minutes.
Peres Jepchirchir is a Kenyan professional long-distance runner who competes mainly in road running competitions. She won the gold medal in the women's marathon at the 2020 Tokyo Olympics. Jepchirchir was the champion at the 2016 and 2020 World Half Marathon Championships. She claimed victories at the 2021 New York City and 2022 Boston Marathon and finished third at the 2023 London Marathon.
The 2018 IAAF World Half Marathon Championships took place on 24 March 2018 in Valencia, Spain. It was the 23rd edition of the event and the 2nd time it was held in Spain.
The 15K run is a long-distance foot race. It is a rarely held race that is not recognized as an Olympic event. The overall world best time for men was set by Jacob Kiplimo en route the Lisbon Half Marathon. Excluding en route times both the world best for men and women were set at the Zevenheuvelenloop in Nijmegen, Netherlands. The world best for men is held by Joshua Cheptegei of Uganda who ran a time of 41:05. The women's world best is held by Letesenbet Gidey of Ethiopia who ran a time of 44:20.
The world record in the half marathon has been officially recognized since 1 January 2004 by the International Association of Athletics Federations (IAAF), the international governing body for the sport of athletics. A total of five men's world records and six women's world records have been officially ratified since that date. The IAAF officially recognized the fastest times before that date as a "world best" from 1 January 2003 onwards. Before that date, the IAAF did not recognize any road running world records, though the concept of a world record was recognized by other organizations, such as the Association of Road Racing Statisticians (ARRS).
Joyciline Jepkosgei is a Kenyan female long-distance runner who competes over distances from 10,000 metres to the marathon. She is the former half marathon world record holder in contests with mixed-gender fields with her personal best of 64:51 minutes, and additionally the former world record holder in the 10 km with 29:43 minutes. She was a bronze medallist over 10,000 m at the African Championships in Athletics in 2016. Jepkosgei ran a world record for the half marathon of 1:04:52 at the Prague Half Marathon in April 2017, becoming the first woman ever to break 65 minutes. She also unofficially broke the IAAF-ratified records for 10 km, 15 km and 20 km along the way, breaking a total of four world records in a single event. She became the first Kenyan ever to break six world records in six months.
The Valencia Marathon is an annual marathon road running event hosted by Valencia, Spain, since 1981. It is categorized as a Platinum Label Road Race by World Athletics. The race is organised by the Valencian sports club SD Correcaminos, which also organises the annual Valencia Half Marathon.
Pauline Kaveke Kamulu is a Kenyan female long-distance runner who competes in track, road and cross country running disciplines. She was a medalist at the IAAF World Half Marathon Championships in 2018.
Brigid Jepchirchir Kosgei is a Kenyan long-distance runner who specialises in the marathon. She won the 2018 and 2019 Chicago Marathons, the 2019 and 2020 London Marathons and the 2021 Tokyo Marathon. Kosgei was the marathon world record holder for women running in a mixed-sex race, with a time of 2:14:04 achieved on 13 October 2019 at the Chicago Marathon. She won the silver medal in the marathon event at the 2020 Tokyo Olympics.
Yalemzerf Yehualaw Densa is an Ethiopian long-distance runner. She won the 2022 London Marathon. Yehualaw is the current world record holder in the 10 kilometres road race, sits second on the world all-time list at the half marathon and tenth on the respective world all-time list for the marathon.
The 2021 London Marathon was the 41st running of the annual London Marathon on 3 October 2021. Due to the COVID-19 pandemic, the race was postponed from April until October to maximise the chances of a mass participation event.
Sabastian Sawe 
