Depends on the event. For the most part most trails are open. During the dh section a trail or two will be closed. During the a-line race, obviously a-line is closed. During the jib session (the one all the pics show) I think they close lower a-line, glc drop and a few others that flow out into the crankworx festival. There are like 40 trails and I think 10 get shut down at any time.

Remember it is only 3 days