Covers development of this new extreme sport.
Site detailing Kester Wilkinson's attempt to complete the Marathon Des Sables in 2005. The MDS is a 7 day, 150mile self-supported adventure race across the Sahara.
Bike, run or ski 135 miles in extreme winter from "Frostbite Falls" on the Canadian border across the Arrowhead Region of Minnesota, USA.
The Iditarod Trail Invitational is the world's longest, least supported winter ultramarathon for cyclists, skiers and runners (350 & 1100 miles). The Race is held on the historic Iditarod Trail in Alaska.
Urban Assault Races. The Amazingly Fun Bike Race Information, registration, dates.
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