She missed the world record by 44 seconds .
On May 6 , Libby James ran the 3rd fastest 75 - 79 half marathon of all time in 1 : 50 : 43 at the Colorado Half Marathon in Fort Collins .
Libby James missed the world record by 44 seconds .
On May 6 , Libby James ran the 3rd fastest 75 - 79 half marathon of all time in 1 : 50 : 43 at the Colorado Half Marathon in Fort Collins .