The RacingThePlanetwebsite has a good summary of the event:
http://www.racingtheplanet.com/atacamacrossing/summary.shtml...The course, designed by world-renowned multi-sport athlete, Ian Adamson, consisted of slot canyons, salt flats, small mountains and lunar-like landscape. Participants were treated to beautiful aqua-colored lagoons, snow-capped volcanoes, Inca ruins, near-freezing streams and even a rainbow in what is called the driest place on Earth. The event finished in the historic and fascinating town of San Pedro de Atacama...
And there are some great photos from race elsewhere on the site: