In early July, Marc-André Bédard’s brother called him up, urging him to try a Spartan Race. Simon Bédard, of Montreal, had just finished one the 5 k trail challenges in Ottawa. He had heard of a $20,000 reward for outrunning the series’ reigning champ, Hobie Call, and figured his brother, Biathlon Canada’s 2008 athlete of the year, could beat him. While training with the national team in Canmore, Alberta, the 2010 Olympian looked into it....