It's not snowmobiling, and it's definitely not motocross. It's called snow biking, and it might be one of the coolest up-and-coming sports out there. Theshow more concept is fairly simple: take a regular motocross bike, slap on a snow mobile track and a front ski instead of wheels, and voilá...you've got a snow bike. To check out this new sport, pro freestyle motocross rider Ronnie Renner set out to test out the bike himself in some fresh Idaho powder. Needless to say, we think they're definitely onto the next big thing. Check out some top moments from their session!