After blowing through 7 pairs of shoes and running an average of 51.6 miles a day, Karl comes to the finish of his 2,064 mile journey across the historic Pony Express trail from Sacramento California to St. Joseph Missouri.br br br The sure-footed, indefatigable Karl now adds Red Bull Human Express to his long list of accomplishments.br br br Check out to find more ridiculous stats on the Red Bull Human Express and the amazing ultra marathoner behind it.