The closest place of significance would be Searchmont in Sault Ste Marie, ON, which borders michigan at the town of the same name..

Your next best bet would be to go to Blue Mountain, a couple hours away from Toronto.

Even a little farther than that, would be to head out between ottawa and montreal, with mt tremblant. If you're a park rat, go to montreal and hit up mont saint sauveur/mont avila - home of one of the best parks in Quebec and the Empire Shakedown contest.

If you're looking for nightlife, i'd suggest tremblant no. 1, then saint sauveur because montreal is fairly close.

Hope this helps.

I'm pretty sure michigan has a lot of places to go snowboarding. There are like 20 resorts, a lot of them are probably open. They are small and nothing like you'd see back at home in europe, but you won't have to drive any more than 8 hours from ann arbor, more like 3 or 4. If you drive to the upper peninsula of michigan i think they've got some bigger mountains up there. Besides if you go up to canada, everything will be more expensive cause of the weak US dollar