Founder of the "Barkley Marathons," one of the toughest ultra-trail races in the world, American Gary Cantrell, also known as Lazarus Lake, has built his legend by designing events on the edge of the impossible. "I'm not fond of pain. Sometimes to get the things you want, some discomfort is involved," he tells AFP in Toulouse, where the "Backyard Toulouse" Ultra is held. IMAGES AND SOUNDBITES