The Marathon des Sables is underway in Morocco. The 151-mile race across the Sahara lasts six days - with an especially grueling 50-mile stage on day four. It is the 25th year runners have flocked to the desert to run. (Updates can be found here.)
According to race rules, competitors must carry all of their gear, cook their own food, and withstand temperatures of 120 degrees during the day. Not quite up to the MdS? Consider starting small - join the Material Girl in marathon training.
-- Jonah Ogles