Off-Road Boarding New sport, mountain boarding is gaining popularity. sports_xtreme_skateboard.jpg 60x45 p0 http://premium.si.cnn.com/pr/video/sports/2002/11/17/mountain_board.r1.smil?rpurl=http://sportsillustrated.cnn.com 10373124440760 cnnsi_free.gif lock_icon.gif superpass.gif http://premium.si.cnn.com/pr/video/sports/2002/11/17/mountain_board.r1.smil?rpurl=http://sportsillustrated.cnn.com 10373124440761 PLAY lock_icon.gif lock_icon.gif lock_icon.gif headline