Edit: I think this is the video:
http://news.nationalgeographic.com/n...ikesonice.html
Their mission: complete a 1,200-mile journey down the frozen Yukon River and up the Bering Sea coast from Dawson, Yukon to Nome, Alaska—on a bicycle.
In other words, mostly off road through sled dog country! That's what I call intense. Expect temps below -40 f. and possibly below -60 f. for the interior.