Kalenjin

The Kalenjin is a Nilotic ethnic group or tribe living in the Great Rift Valley in western Kenya. The Kalenjin population is estimated at roughly 3 million.

There are several smaller tribal groupings within the Kalenjin: Elgeyo, Kipsigis, Marakwet, Nandi, Pokot, Sabaot, Terik, Tugen.

They are pastoralists and are believed to have migrated to their present location from Sudan 2,000 years ago.

The Kalenjin have been called by some "the running tribe." Since the mid-1960s, Kenyan men have earned the largest share of major honors in international athletics at distances from 800 meters to the marathon; the vast majority of these Kenyan running stars have been Kalenjin. From 1980 on, about 40% of the top honors available to men in international athletics at these distances (Olympic medals, World Championships medals, and World Cross Country Championships honors) have been earned by Kalenjin. In recent years, Kenyan women have become a major presence in international athletics at the distances; most of these women are also Kalenjin.