A snowmobile, also known as a sled or a snowmachine, is a vehicle designed for winter travel and recreation on snow. It is designed to be operated on snow and ice and does not require a road or trail but most are driven on open terrain or trails.

Older snowmobiles could generally accommodate two people, however most snowmobiles manufactured in the last twenty five years have been designed for a single rider. Snowmobiles built with the ability to carry two riders are referred to as "2-up" snowmobiles and make up an extremely small size of the market, commonly referred to as 'touring' models. They do not have any enclosures, except for a windshield, and their engines normally drive a continuous track at the rear. Skis at the front provide directional control.