The course of the Atacama Crossing (Chile), a 7-day, 250-kilometer self-supported footrace, takes competitors across a wide variety of terrains and includes approximately 3,500 meters (11,500 feet) of ascents and descents over the 7-day race. Competitors will tackle sand-dunes, river crossings, gravel, loose rocks, hard packed earth and even waist high grass during the event. This is in addition to the infamous salt flats that even the most dexterous of runners find nearly impossible to cross at full-speed. More information about the race is available at www.4deserts.com/atacamacrossing