I've been trying this for awhile, hitting the walls before i got half way though. So, instead of goin at a rediculous pace, I just slowed down and took grandma turns and still just made it in 4:11.8. stupid. The Moral of the story is, if you cant beat this challenge, slow the **** down! (In most cases at least- you have to know how to drive snow of course). 4:05 though? Wow.