Whakaotihia te rerenga e whai ake nei: I tīmata a Vail ki te whakangungu i te tau kotahi i tana tau tuatahi i Centennial High School. I haere ia ki te Whare Wananga o Oklahoma State i reira ia te kaiarahi o te kapa NCAA Cross Country National Championship 2009. I muri tonu i tana tohu i Oklahoma State, ka hainatia e Vail tetahi kirimana me Brooks Sports. I uru a Vail ki nga Whakamatau Orimipia o te tau 2012, i te wa i eke ai ia ki runga. Ko Vail hoki te toa o Amerika i te 2013 New York Marathon, me te
Ko te 2014 London Marathon, i mutu ai ia i te 10 i te 2' 10" 57, ko tana tino pai.