High Quality Content by WIKIPEDIA articles! Snowboard cross (also Snowboarder X, SBX, Boardercross, Boarder-X or BX) is a snowboard competition in which a group of snowboarders (usually four) start simultaneously atop an inclined course, then race to reach the finish line first. Snowboard cross became an Olympic sport in 2006, and has been part of the Winter X Games since the annual event began in 1997. At the X Games the sport is called Snowboarder X.