Iron Mask is one of the best expert trails at Copper.
You need a lot of snow here to make it best and the cornice jump itself will keep most people away.
The bigger the snow, the bigger the cornice.
Bring a camera and some guts.
After you land, the terrain is steep and lots of rocks and pitch changes await you.
This is the place to get that great photo of you nailing that hit.
This is fairly short though and flattens out at the end.