Check out the Yukon Quest, the 1000 mile dog sled race that runs from Fairbanks, Alaska, USA to Whitehorse, Yukon, Canada.
http://www.youtube.com/watch?v=kfZIHhAlXtI
Track the racers live here:
http://www.yukonquest.com/site/live-tracking/
The official Yukon Quest site is found here:
http://www.facebook.com/YukonQuest