Rubuta ci gaba don wannan sakin layi - Wanjiku ya wakilci Kenya a gasar zakarun duniya ta IAAF ta 1999
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.