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The 6 Hardest Races in the World

For many people, completing a marathon is the accomplishment of a lifetime. For others, racing 50 or even 100 miles is the ultimate challenge. Some people, however, seek out events that border on impossible. By combining extreme distances with rugged terrain, heat, cold, elevation, and route finding difficulties, these competitions--and those that complete them--compete for [...]

Published On 07/19/2011
12:29 AM EDT
Photo: USACE Europe District / Creative Commons