Ultrarunner Courtney Dauwalter Takes On The World's Most Sadistic Endurance RaceGary Cantrell clanged a bell at 6:40 a.m. on Saturday, Oct. 20, signaling 70 runners to jog off into the woods on his farm in Tennessee. They had an hour to complete a 4.1667-mile loop trail. Easy. Most of the group finished with 15 minutes to spare. The bell clanged again at 7:40 a.m., and they ran...
