Professional snowboarders stormed the half pipe today at Copper Mountain for their practice runs to begin the 2012 Sprint US Grand Prix. Big names like Danny Davis, Scotty Lago and Louie Vito were all throwing it down and Snowboard Colorado was there to see it all. With one more day left to practice, the riders are still testing out their runs and getting a feel for what will and won't work in competition. Snowboard half pipe qualifiers begin Thursday, December 8th at 8am. After qualifiers on Thursday, the top riders will go on to the finals Saturday, Dec 10th starting at 11am. With the kind of progression that has been happening in the last year, this Grand Prix is one that you won't want to miss.