Situations can become "life threatening," organizers warn.
It's 3:30 p.m. and won't be long before darkness falls. The ice fog is rolling across the trail and frost hangs from the trees and bushes like a white blanket. I've got enough water for a couple of hours but there's a small hitch, I don't know where I am. Should I continue on this road or turn back? Am I heading towards Whitehorse or Dawson City? Time to make a decision.