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Steep & Deep should be called Steep & Short as after 15 turns at the most you are down at the flat part.
But the 15 turns are relatively steep and there are many trees to throw some difficulty at you.
We wouldn't recommend falling at the top because you'll probably go pin-balling through the trees until it flattens out and they will hurt.
When it does get flat the trees are pretty tight so it's best to traverse either left or right to more open glades until you get to Pete's Express Lift.