Anton Krupicka is a mountain runner living in Boulder, CO. He is a two-time Leadville 100 Champion (2006, 2007) and two-time USATF 50 mile Trail National Champion and course record holder (2009, 2010). In 2010, Krupicka was 2nd in the prestigious Western States 100, a race captured in the film Unbreakable: The Western States 100. He is a footwear and apparel athlete for La Sportiva and is also sponsored by Buff Headwear, Ultimate Direction, Petzl, Stance, and Zeal Optics.

After breaking his leg in 2011, Krupicka began to diversify his mountain endeavors. In addition to racing, he also started pursuing remote summits, long traverses, and ambitious link-ups in a single-push style that requires a unique combination of mountain running fitness and technical climbing competence. For half the year Krupicka is on the road, running and racing abroad or living in the back of his pickup truck, haunting the mountain ranges of the American West.