US Half Marathon Championship ends in chaos as lead runners guided in wrong direction

• Lead vehicle takes top-three off main course

• Jess McClain falls from first to ninth

USA Track & Field has denied an appeal after its Half Marathon Championship in Atlanta ended in chaos.

With less than two miles to go in the women's race, Jess McClain had a significant lead over Ednah Kurgat and Emma Hurley when the guide vehicle took the trio off course. Molly Born, who had been more than a minute behind the leaders, came through to win the race, with Carrie Ellwood and and Annie Rodenfels in second and third. McClain, Hurley and Kurgat finished in ninth, 12th and 13th respectively around two minutes behind Born. Wesley Kiptoo won the men's race.