its alot! because i used to snowboard and i'd have to eat about 2,000 calories a day. all i remember is that you burn 75 watching tv for an hour straight. soccer for an hour is like 450. so i guess snowboarding for an hour would be around that
Snowboarding for 4 hours, you can burn 1,000 to 2,000 calories if you weigh anywhere from 100 to 130lb.
That's about 300 to 500 calories an hour. :)