X Corps Action Sports Show #18.) MTN.BOARD seg.3- Xcorps host Eric Ducharme and 20 other dirt board skaters roll down the infamous Nate Harrison grade on the backside of Californias Mt. Palomar in this grassroots speed driven episode.br br All terrain skating also known as mountain boarding is a hybrid sport that has taken skating to a whole new grass roots level of adrenalized excitement.br br Once again Xcorps cameras were the only ones rolling on the action as boarders ripped down the 7 miles of rough fire road on the historic Palomar Mtn which is topped by the famous observatory. Race rules were simple- fastest time to the bottom of the mountain wins.