Bismarck, North Dakota – Authorities said a 34-year-old Bismarck, North Dakota man died in an avalanche while riding a snow bike north of Yellowstone National Park.
According to Park County Coroner Al Jenkins, the man died Saturday as a result of asphyxiation.
The victim and one other person were riding snow bikes near Cooke City, along with three others who were on snowmobiles.
He had stopped his bike on a steep ridge, and another member of the group was riding on windblown snow over the ridge.
That vehicle triggered a slide that pushed him over the ridge and buried him under about a foot of snow.