For anyone thinking about coming to nationals this year at Valmont Bike Park, I just posted bar cam footage from the race held there yesterday:
I don't know how the nationals course will be laid out, but this was a pretty typical setup, and included all the cross-specific features in the park.
Its going to be Great! I do hope that all or most of the single track will be eliminated because it really prevents passing. Even if the tape is wide, you still can't get around the person in front of you on the hard pack single track. It would be nice it use some of the grass in the big jumps area. It will be one of the best Nationals ever.