VIDEO: Trail Fighter

Outdoor Research athlete Kyle Dietz knows how to train, how to handle pain, and how to dig deep and gut it out when things get tough: he used to compete as a mixed martial arts fighter. Now he's set his sights on mountain running, taking those same skills and conviction to trail races. He doesn't live in the mountains, though—he lives and trains in Iowa—so how does he prepare for big climbs and altitude, and how did it all work out at last year's The Rut 50K? Trail Fighter follows Kyle's journey.