Skeleton is a winter sliding sport in which a person rides a small sled, known as a skeleton bobsled, down a frozen track while lying face down and head-first. The sport and the sled may have been named from the bony appearance of the sled.

Winter sports or winter activities are competitive sports or non-competitive recreational activities which are played on snow or ice. Most are variations of skiing, ice skating and sledding. Traditionally, such games were only played in cold areas during winter, but artificial snow and artificial ice allow more flexibility. Playing areas and fields consist of either snow or ice.