Ka cika wannan jumla: Shekarar da ta samu nasara ita ce shekara ta 2006. A ranar 24 ga Maris, 2006 ta lashe gasar tseren mita 800 na mata a
Wasannin Commonwealth na 2006 tare da lokacin minti 1, dakika 57.88. Ta yi nasarar doke gwani mai tsere Maria de Lurdes Mutola daga Mozambique. Daga baya a wannan shekarar ta lashe Gasar Zakarun Afirka a Wasannin motsa jiki a tseren mita 800. Ta kuma doke tarihin mata na mita 800 na Kenya sau biyu. An ba Jepkosgei lambar yabo ta 'yar wasan Kenya ta shekara ta 2006.