McKinnon has sizable lead heading into final event, while Bohonnon looks for eighth or better.
Host US squad represented well across the board.
Hannah Kearney leads tight ladies' race while Mikael Kingsbury reigns on the men's side.
Joss Christensen, Jesper Tjader, Emma Dahlstrom, all set to take it large in Park City.
Almost anyone who's anyone in the ski halfpipe world on hand in Utah for the final USSA Grand Prix of the season.