Kammala jumla mai zuwa: Chepkorir ta kafa kanta a cikin manyan masu tseren rabin marathon a duniya tare da cin nasara a Berlin Half Marathon a watan Maris na 2010, tana gudanar da mafi kyawun minti 69:43 don doke Eunice Kales. Ta koma birnin Jamus don tseren BIG 25 na Berlin, kuma ta zama ta uku. An zabi ta ta yi takara a Kenya a gasar cin kofin duniya.
2010 IAAF World Half Marathon Championships amma rauni ya rage lokacinta kafin ta iya yin wasan farko na kasa da kasa a can.