Anton Krupicka is a mountain athlete living in Boulder, CO. He is a two-time Leadville 100 Champion and two-time 50 mile Trail National Champion. In 2010, Krupicka was 2nd in the prestigious Western States 100, a race captured in the film Unbreakable: The Western States 100.

After breaking his leg in 2011, Krupicka began to diversify his mountain endeavors to include climbing, skiing, and biking. In addition to racing, he also started pursuing remote summits, long traverses, and ambitious link-ups in a self-powered, single-push, multi-sport style that requires a combination of fitness and technical/mountaineering skill. He is a footwear and apparel athlete for La Sportiva and is also sponsored by Petzl, Ultimate Direction, Zeal Optics, Ciele, and Stance.