Zach Miller lives in a cabin in the woods halfway up Colorado’s Pikes Peak, and it’s a big reason why he’s become one of the world’s top trail runners in recent years. The 27-year-old Nike Trail Elite runner is one of the five year-round caretakers at historic Barr Camp, and although it’s an arduous job that requires a rather spartan lifestyle, it provides him with an ideal place to train for the world’s toughest trail races. We caught up with Miller this summer as he was preparing for the 104-mile Ultra-Trail du Mont Blanc race on Aug. 26-27 through parts of France, Italy and Switzerland.