Nickademus Hollon is powering through the world's toughest endurance races ... while also creating a few of his own, too

At 25, Nickademus Hollon is excelling in ultra-endurance events, an arena usually dominated by athletes in their 30s and 40s. He's the youngest ever to complete two of the world's hardest ultras, the Badwater and Barkleys ultramarathons. My story for ESPN.com's Endurance Sports section: http://espn.go.com/sports/endurance/story/_/id/13295306/endurance-sports-nickademus-hollon-building-impressive-endurance-portfolio