Profile In Motion: Kris Mendoza, World's Toughest Mudder

Take a run with world champion Tough Mudder and obstacle course racing (O.C.R.) competitor Kris Mendoza on his local trails on North Table Mountain in Golden, Colo. Mendoza discusses balancing outdoor pursuits with his job as a dental anesthesiologist; takes us through his weekly training; and opens up about the tragedy in 2014 that sparked his O.C.R. obsession.