
The decision comes after two horrific snowmobiling incidents last January in Aspen, Colo., including the death of Caleb Moore from injuries he sustained when his 450-pound sled rolled over him after a backflip gone wrong during a freestyle competition.

The 25-year-old innovative freestyle snowmobile rider Caleb Moore has died after being injured in a crash last week during the Winter X Games in Colorado.

Snowmobiler Caleb Moore died Thursday after being injured in a crash last week during the Winter X Games in Colorado.

Moore's grandfather told The Denver Post the prognosis isn't good and that it's "almost certain" the 25-year-old won't recover.