A snowmobile (or snow scooter, often referred to by enthusiasts as a 'sled' and in the Canadian north and Alaska as a 'snowmachine', or as the genericized trademark of 'Ski-Doo') is a land vehicle propelled by one rubber track with ski(s) for steering. They are designed to be operated on snow and ice, and require no road or trail. Most snowmobiles are typically powered by two-stroke gasoline/petrol internal combustion engines.