Lornah Kiplagat (born 1 May 1974) is a Dutch long-distance runner. She was born in Kabiemit, Rift Valley Province, Kenya and came to the Netherlands in 1999. She gained Dutch citizenship in 2003 and has competed for the Netherlands since. She runs not only road events but also in cross country and track and field

She ran at the 2004 and 2008 Summer Olympics, was the 2007 gold medallist at the IAAF World Cross Country Championships, and took three straight World Road Running Championship titles from 2006 to 2008. In the marathon, she holds a best time of 2:22:22 hours and has won major races in Rotterdam, Amsterdam and Osaka. She currently holds the world road record over 5 kilometres and 10 miles. Her best times over 20 km and the half marathon distance were world records from 2007 to 2011 and remain the second fastest times ever.

Part of a highly successful family of runners, her relatives include Sylvia Kibet, Hilda Kibet and Susan Sirma.

Kiplagat was already running decent results when she still ran for Kenya. She was the first woman to win both the Falmouth Road Race and the Peachtree Road Race. As of 2006 she is still the only woman to achieve this, but she achieved it three times in a row (2000, 2001 and 2002) and a fourth time in 2005 as well. Among her other achievements are the Amsterdam Marathon, the Rotterdam Marathon, the Osaka Ladies Marathon and the Los Angeles Marathon

Luke Kibet (born 12 April 1983) is a Kenyan long-distance runner who specializes in the marathon. He won the marathon race at the 2007 World Championships.

Kibet was born in Kaplelach village, Moiben division, Uasin Gishu District. Famed Kenyan runners Samson Kitur and Noah Ngeny come from the same area.

Kibet took up running in 1996, aged 13, impressed by the Kenyan performances at the 1996 Summer Olympics. He went to Moiben Secondary School from 1997 to 2000 and then joined Kenya Prisons Service.

Kibet originally specialized in the steeplechase, his personal best being 8:25.4 minutes. In 2003, he won the Tilburg Ten Miles race in Tilburg, Netherlands. He ran his first half marathon in 2003, finishing fourth in the City-Pier-City Loop in Den Haag.

He took up the marathon in 2004 and reached the international level in this event. Kibet entered his first marathon, 2004 Enschede Marathon, as a pacemaker, but finished the race at 2nd position timing 2:11:06. He finished second also at the 2004 Frankfurt Marathon. He also won a 25-km race in Berlin that year.