Jeptoo 's run over the final ten kilometers gave her a 2 : 19.57 final time , the fastest women 's marathon time in the world for 2013 .
Rita Jeptoo 's race was all in the final 17 kilometers .
Jeptoo 's run over the final ten kilometers gave Rita Jeptoo a 2 : 19.57 final time , the fastest women 's marathon time in the world for 2013 .
Rita Jeptoo 's race was all in the final 17 kilometers .