A dog sled or dog sleigh[1] is a sled pulled by one or more sled dogs used to travel over ice and through snow. Numerous types of sleds are used, depending on their function. They can be used for dog sled racing. Traditionally in Greenland and the eastern Canadian Arctic the Inuit had the dogs pull in a fan shape in front of the sled, while in other regions, such as Alaska and the western part of Northern Canada the dogs pull side by side in pairs.