The first edition of the Marathon des Sables began several years . 1,024 runners will cover 350 kilometers in six stages . The epic race is billed as the toughest footrace on Earth . It has to be entered Sunday in advance .
The 28th edition of the Marathon des Sables began Sunday . 1,024 runners will cover more than 220 kilometers in six stages . The epic race is billed as the toughest footrace on Earth . It has to be entered several years in advance .