Runners in the 2008 New York City Half Marathon running past the Park Central Hotel
A half marathon is a road running event of 21.0975 kilometres (13.1094 mi). It is half the distance of a marathon and usually run on roads. Participation in half marathons has grown steadily. One of the main reasons for this is that it is a challenging distance, but does not require the same level of training that a marathon requires. In 2008, Running USA reported that the half marathon is the fastest growing type of race. A 2010 article by Universal Sports echoed the growing popularity of the distance. New York Road Runners CEO Mary Wittenberg and noted running author and coach Jeff Galloway have also commented on the popularity of the distance. It is common for a half marathon event to be held concurrently with a marathon, using almost the same course with a late start, an early finish or shortcuts. The half marathon is also known as a 21K, 21.1K or 13.1 miles, although these values are rounded and not formally correct.
World record progression 
World records in the half marathon are now ratified by the International Association of Athletics Federations, the international governing body for the sport of athletics.
The official IAAF world record for men is 58:23, set by Zersenay Tadese of Eritrea on 21 March 2010 in Lisbon, Portugal, and for women is 1:05:50, set by Mary Keitany of Kenya on 18 February 2011, in Ras al-Khaimah, United Arab Emirates.
This list is a chronological progression of record times for the half marathon.
 Listed by the International Association of Athletics Federations as a world best prior to official acceptance
 Ratified by the International Association of Athletics Federations as a world best (since January 1, 2003) or world record (since January 1, 2004)
a Noted by the International Association of Athletics Federations as set on uncertified or aided course which does not fulfill the criteria specified in IAAF Rule 260.28.b or 260.28.c
+ Noted by the International Association of Athletics Federations as set en route to longer distances Recognized by the Association of Road Racing Statisticians
|67:01||Brian Hill-Cottingham||United Kingdom||April 9, 1960||Romford||ARRS|
|65:44||Ron Hill||United Kingdom||June 19, 1965||Freckleton||IAAF, ARRS|
|65:42||Pete Ravald||United Kingdom||June 18, 1966||Freckleton||IAAF, ARRS|
|64:28 a +||Abebe Bikila||Ethiopia||October 21, 1964||Tokyo||IAAF|
|63:22 a +||Derek Clayton||Australia||December 3, 1967||Fukuoka Marathon||IAAF|
|64:45||Ron Hill||United Kingdom||June 21, 1969||Freckleton||IAAF, ARRS|
|63:53||Derek Graham||United Kingdom||May 2, 1970||Belfast||IAAF, ARRS|
|63:46||Juan Rafael Angel Perez||Costa Rica||February 8, 1976||Coamo||IAAF, ARRS|
|63:46||Jose Reveyn||Belgium||March 27, 1976||Den Haag||IAAF|
|62:57||Miruts Yifter||Ethiopia||February 6, 1977||Coamo||IAAF||IAAF notes unrounded time as 62:56.3|
|62:37||Toshihiro Matsumoto||Japan||February 6, 1977||Beppu, Ōita||ARRS|
|62:47||Tony Simmons||United Kingdom||June 24, 1978||Welwyn Garden City||IAAF|
|62:36||Nick Rose||United Kingdom||October 14, 1979||Dayton||IAAF, ARRS|
|62:32||Kirk Pfeffer||United States||December 7, 1979||Las Vegas||IAAF, ARRS|
|62:16||Stan Mavis||United States||January 27, 1980||New Orleans||IAAF, ARRS|
|61:47||Herb Lindsay||United States||September 20, 1981||Manchester, Vermont||IAAF|
|61:36||Mike Musyoki||Kenya||September 19, 1982||Philadelphia||IAAF, ARRS|
|61:32||Paul Cummings||United States||September 25, 1983||Dayton||IAAF, ARRS|
|61:14||Steve Jones||United Kingdom||August 11, 1985||Birmingham||IAAF, ARRS|
|60:55||Mark Curp||United States||September 15, 1985||Philadelphia||IAAF, ARRS|
|60:43 a||Mike Musyoki||Kenya||June 8, 1986||South Shields||IAAF|
|60:10 a||Matthews Temane||South Africa||July 25, 1987||East London||IAAF|
|60:46||Dionicio Ceron||Mexico||September 16, 1990||Philadelphia||ARRS|
|60:06 a||Steve Moneghetti||Australia||January 24, 1993||Tokyo||IAAF|
|60:24||Benson Masya||Kenya||April 3, 1993||Den Haag||ARRS|
|59:47||Moses Tanui||Kenya||April 3, 1993||Milan||IAAF|
|60:13||Paul Tergat||Kenya||April 15, 1993||Milan||ARRS|
|59:56||Shem Kororia||Kenya||October 4, 1997||Košice||ARRS|
|59:43 a||António Pinto||Portugal||March 15, 1998||Lisboa||IAAF|
|59:17||Paul Tergat||Kenya||April 4, 1998||Milano||IAAF, ARRS|
|59:06 a||Paul Tergat||Kenya||March 26, 2000||Lisboa||IAAF|
|59:16||Samuel Wanjiru||Kenya||September 11, 2005||Rotterdam||IAAF, ARRS||ARRS notes unrounded time as 59:15.8|
|59:05 a||Zersenay Tadesse||Eritrea||September 18, 2005||South Shields||IAAF|
|58:55||Haile Gebrselassie||Ethiopia||January 15, 2006||Tempe||IAAF|
|59:07||Paul Kosgei Malakwen||Kenya||April 2, 2006||Berlin||ARRS|
|58:53||Samuel Wanjiru||Kenya||February 9, 2007||Ras al-Khaimah||IAAF, ARRS|
|58:33||Samuel Wanjiru||Kenya||March 17, 2007||Den Haag||IAAF, ARRS||ARRS notes time as 58:35|
|58:23||Zersenay Tadese||Eritrea||March 21, 2010||Lisbon||IAAF,ARRS|
Best Year Performance 
Largest number of participants 
The current biggest half marathon in the world is the Göteborgsvarvet, also known as Gothenburg half marathon, held annually in Gothenburg, Sweden, with 59,417 announced runners and 43,026 finishers in 2011.
See also 
- USATF: Course Measurement and Certification Procedures
- Hanc, John (July 24, 2008). "Sometimes Half Is Better Than Whole". NY Times. Retrieved 2009-02-09.
- Monti, David (May 20, 2010). "Half the distance, twice the fun: Half-marathons taking off". Universal Sports. Retrieved 2010-05-21.
- "12th IAAF World Championships In Athletics: IAAF Statistics Handbook. Berlin 2009." (PDF). Monte Carlo: IAAF Media & Public Relations Department. 2009. pp. 546, 563, 565, 651, and 653. Retrieved April 15, 2011.
- "World Best Progressions- Road". Association of Road Racing Statisticians. Retrieved April 15, 2011.
- International Association of Athletics Federations (May 10, 2010). "World Records Ratified". Monte Carlo. Retrieved June 26, 2011
- IAAF world records
- "Yearly Rankings- Half Marathon". ARRS rankings. Association of Road Racing Statisticians. Retrieved 2010-11-16.
- "Year 2012 Performances- Half Marathon". ARRS rankings. Association of Road Racing Statisticians. Retrieved 1 March 2013.
- Published in IAAF documents, including IAAF top lists. The ARRS have suggested that the Stramilano Half Marathon course might have been short in 1993 and list the best time for 1993 as 1:00:15, Moses Tanui (KEN), 19-Sep-1993, South Shields ENG.
- Från 1 800 till 74 000 på 32 år
- Bridge Race 2000
- Broloppstider på nätet - men inga placeringar