Try this... The Iditarod without Dogs * Unlike the famous annual sled-dog mush in Alaska, the qualifiers in the Iditarod Trail Invitational navigate a similar trail on their own power: no dogs or motors allowed. http://www.nytimes.com/2008/12/24/sports/othersports/24ultra.html?pagewanted=1&_r=1&emc=eta1