Cold-weather biking (also referred to as winter biking, snowbiking or icebiking) is the activity of cycling in winter weather with snow, ice, and slush. As in warm months, people bike in cold-weather for several reasons. Bike commuters cycle to work for exercise, to reduce their carbon footprint, or to save on the costs of parking, amortized car purchase (by making less frequent), car maintenance, insurance, and fuel. Recreational snow or ice-bikers include off-road bikers who ride on snowmobile trails with underinflated, fat tires and ice-bikers who use frozen streams, ponds, or rivers, or who race on iced-over lakes.

Winter roads may have less space for cars and bicycles to share, when snowbanks line the roads. To maintain control of a bike on icy roads, cyclists need a different riding style than they would use in summer. Bikers tend to ride more slowly and cautiously, be more upright on turns, and avoid using the front brake on icy roads, because front braking can lead to skidding and crashing.