Though coming to the sport later than most, John Gaston is the current U.S. National Ski Mountaineering champion and has won multiple prestigious U.S. events, including the Audi Power of Four 10 times. He is arguably the country's best ski mountaineering, or skimo racer, and competes on the world stage in the winter. 

During the summer, Gaston mountain bikes the trails near his home in Aspen to maintain fitness and revel in the high alpine environment. In August, he placed second overall at the Leadville 100 mountain bike race, ahead of a stacked field of the world's top professional cyclists. 

Listen in as Gaston reveals his training philosophy to compete at the world-class level in two different sports, balancing a growing family with running an apparel brand and the potentially limited future of elite-level skimo in the U.S.