Not all of Canada has snow.
But yeah, Excite Truck is defintiely one of the best games for the system. Excellent driving mechanics, and a TON of stuff to unlock. I remember being skeptical about it at first because I "heard" there wasn't much to do or unlock but there is a SHIT ton to do in this game. I'm working on unlocking all the cars so I can get the monster truck.
But yeah, I don't recognize the Canada level either. If it were BC it would be way greener. If it were Alberta it wouldn't have so much water. My theory is that it's Prince Edward Island - they're the only ones that have red soil.