Running 50 Miles For 50 Days Red Bull Human Express Video

Ultramarathon runner Karl Meltzer will embark on his attempt to cross the historic Pony Express by foot. He will cross the Rocky Mountains and the Great Plains from Sacramento, California to St.Joseph, Missouri relying solely on his wits, athleticism and endurance to push the boundaries of human potential. Keep up with Karl at http://RedBullUSA.com/HumanExpress