Snow mobiles, also known as sleds, are motorized vehicles designed for travel on snow. They are typically used for recreation, but can also be used for transportation in areas with heavy snowfall. Snow mobiles have skis or tracks at the front and rear, and a motor mounted in the middle. They are powered by gasoline or diesel engines, and can reach speeds of up to 100 mph. Snow mobiles are popular in countries with cold climates, such as Canada, Finland, and Norway.