Lornah Kiplagat is a Dutch long-distance runner. She was born in Kabiemit, Kenya and came to the Netherlands in 1999. She gained Dutch citizenship in 2003 and has run for the Netherlands since. She is specialised not only in road running, she also runs track and field. She currently holds the world records at the distances 5000 meters on the road, 10 Mile, 20,000 meters on the road, and half marathon.
Besides the Dutch marathon record, Kiplagat also owns four World records. In the 5000 meter road race she ran the distance in 14:47, while she lowered her own record in the 10 miles of 50.54 by two seconds to 50.50 during the 2006 Dam tot Damloop, which she also won in 2002. On 14 October 2007, Kiplagat set a new half-marathon world record of 1:06:25 at the World Road Running Championships at Udine, Italy, while defending the title she first won in 2006. She also smashed her own 20km world record en route, running 1:02:57.