10 Extreme Marathons

Competing a grueling marathon isn’t challenging enough for some runners.  Woman’s Day has a list of ten marathons, some of them run under brutal conditions.  The picture above is from Greenland’s marathon.  Others featured include a marathon run up and down the steps of the Great Wall of China, one that starts at 17,000 feet above sea level, and another run at the Dead Sea.

Link via The Presurfer