In the elite mens race, I'd say it's very wide open with multiple riders who can win. The favourites have to be Kerry Werner and Curtis White who dominated the scene in the US this year. Defending champ Stephen Hyde is also one to look out for as he seems to be getting back to the level of last year. Others include Cody Kaiser, Drew Dillman, Jamey Driscoll and Grant Ellwood.
Similarly in the women's race, I think there are multiple winners possible. Katie Compton and Katie Keogh have raced the whole season in europe with alot of top tens, while riders like Rebbeca Fahringer, Clara Honsinger and Courtney Macfadden will have been the top riders in the domestic scene. Ellen Noble is back from health issues so should also feature.
In the U23 mens, Lance Haidet, Spencer Petrov (defending champ), Lane Maher, Eric Brunner and Sam Noel are the top riders.
I think Katie Clouse is the standout inthe U23 women.
In the juniors, I'm not so sure but Andrew Strohmaher is the Pan American champ, with other riders at the front of that race being Jared Scott - 4th last year, Nick Carter - 2nd last year and Magnus Sheffield - 3rd last year.
The junior women's I'd say Maddy Munro (PanAm champ), Lizzy Gunsalsus, Bridget Tooley, Michaela Thompson wnd Lauren Zoerner are the favourites.