at the 2015 games, briggs was able to climb to 4th overall despite the injuries that she had suffered earlier in the season. her best performance was on , in which the athletes completed in the over temperatures in the afternoon. while other athletes, like annie thorisdottir and kara webb, sustained heat related injuries, briggs ran to the finish line in 39 minutes, 10 seconds, seemingly unfazed and more than a minute ahead of the next closest female athlete, alethea boon of new zealand, and quicker than all the male athletes but one, björgvin karl guðmundsson of iceland. eight athletes would not finish within the 1 hour time-cap, including eight-times games competitor rebecca voigt, twice champion annie thorisdottir, and 2013 silver medalist lindsey valenzuela.