make sure that it is not built into the snow. Try and build up a platform so that the box sits about 2 feet higher than the jump on. make the jump the same angle as the box and make sure that the bottom of the box is not in the snow.
This. Def do not have it as a ride on. Vail's was set up perfect.
That and the rainbow were set up the same way. They didn't have a huge gap to the box, but you don't need it. It could be hit faster or slower. It's kind of fun to just creep over the flat and almost stall before you hit the down.