Toughest Races in the World
Today on this lazy Sunday, we take a look at some of the world's toughest and most challenging races to inspire our readers. Each of these races test your stamina, physical fitness, survival instincts, ability to withstand and endure hard trials, and above all - persist. These are the toughest races in the world that will push you to the edge.
*Images courtesy: © Thinkstock photos/ Getty Images