Cika jumlar da ke gaba: Wanjiku ya wakilci Kenya a
1999 IAAF World Cross Country Championships kuma ya sanya na takwas a cikin gajeren tseren mata. Ta lashe tseren hanyoyi da yawa a Amurka ciki har da Birnin Pittsburgh Great Race (sau biyu), Broad Street Run, Fifth Third River Bank Run (sau biyu) da Cherry Blossom Ten Mile Run.