One of the best-known and most grueling ultramarathons in the world, Morocco's Marathon of the Sands (also known as Marathon des Sables or the Sands Marathon) is comprised of six torturous races across 150 miles of burning sands in the Sahara Desert. The race (the equivalent of six standard marathons) spans seven days and includes "Dune Day," which wends through the Sahara's highest dunes. More than 700 competitors come from around the world in the Men's and Women's Divisions. In this 14th edition of the race, American Lisa Smith defends her title in the Women's Division. The Men's Division is lead by the amazing Ahansal brothers, who hail from the remote Saharan town of Zagora.