Arthur Mouratidis/Wikimedia Commons

With riders reaching speeds of up to 60 miles per hour and heights as high as 130 feet, Snocross (a winter weather version of motor cross performed with snowmobiles) is not only one of the most extreme non-Olympic winter sports, but also one of the most organized. Governed by the World Snowmobile Association, Snocross was first featured in the 1998 winter X Games (it was removed in 2011). Both its participation and following has grown significantly since then and the ISOC hosts a handful of yearly regional and national events.