During the Tour, you will be in Alaska. The last event in this region, is called the "Denali" and they recommend you use armor for this event, because of the avalanche.
Choose this event, and make sure you are NOT do not armour. You should have a very low survival probability (4%).
Just take your time down the hill. The hardest part is adjusting to the new camera angle. Control and use boost when you need it, and make sure to listen to the announcer as well as take the clues written on the slopes of the mountain as you go down, and this one is pretty easy. Also, you are allowed 3 total rewinds, if you ever take a nasty spill, and they will not prevent you from attaining the achievement.
Take your time and listen to the clues!