The world's coldest and toughest ultra Marathon, 100, 300 and 460 miles, for runners, mountain bikers, XC-skiers or skijorers, takes off again in the Yukon, Canada, February 11th - 24th, 2007.

Following the Yukon Quest trail, the trail of the world's toughest Sled Dog Race, the
Yukon Arctic Ultra begins at downtown Whitehorse next to the Yukon river.

Labels: sled dog, ultra marathon, Yukon, Yukon Arctic Ultra, Yukon Quest trail