Hey nice edit dude.  Some things i noticed:
-Definitely the noise as people said.  I'd say you could have muted it entirely, or just turned it down a lot.
-The song wasn't too bad, but it was just really repetitive.
-You could have cut the riding into the rails a little bit shorter.
-Some shots could have been smoother.
However, I liked your edit length and enjoyed that you could see what was going on at night.  Skiing was very good.
Good work.