The 2011 U.S. Snowboarding Grand Prix, the longest running domestic snowboarding tour, has two stops scheduled during its 15th season. Riders will hit Copper Mountain, Colorado on December 8-11, 2010 first before moving west to Mammoth Mountain, California on March 4-6, 2011. The Copper Mountain stop will include both a ski and snowboard halfpipe event which is a first in US Grand Prix history. As well as the Paul Mitchell Progression Session on Saturday night under the lights! In Mammoth Mountain, the riders will … Details