Trip ideas wanted!

It's been a quiet few months on the adventure front.  My wife and I managed a quick weekend trip to the Bruce Peninsula in early November.  The weather was cold and clear.  Perfect for autumn hiking.  In fact, it was cold enough that my camera's battery died, and I couldn't get even one shot.  We kept our mileage low, and enjoyed being outdoors together in a quiet and beautiful setting.  It was a great weekend for relaxation after a hectic couple of months at school, with every weekend before it occupied with work.

Now, with autumn quickly turning to winter, I'm looking ahead to the coming months and brainstorming for trip ideas.  I'm somewhat restricted to weekend length outings only, due to being a full-time student.  And I can only afford one weekend off work, so I've only got one opportunity for the season.  As such, I'd like to maximize my 'adventure time'.  I don't want to drive more than 2 hours from home (near Peterborough, Ontario), and am open to snowshoeing, skiing, hiking, or whatever else you might suggest by way of self-propulsion in winter.  I'm looking for YOUR suggestions as to location and activity . . . please comment!