Dog sled racing is a winter racing sport most popular in the Arcticregions of the United States, Canada, Russia, and some European countries.It involves the timed competition of teams of sleddogs that pull a sled with the dog driver or musher standing on the runners. The team completing the marked course in the least time is judged the winner.Sled dog races include "sprint" races over relatively short distances of 4 to 25 miles, mid-distance races from 28 to 200 miles, or long-distance races of 200 to over 1000 miles. Sprint races frequently are two or three-day events with heats run on successive days with the same dogs over the same course. Mid-distance races are either heat races of 14 to 80 miles per day, or continuous races' of 100 to 200 miles. (These categories are informal and may overlap to a certain extent.) Long-distance races may be continuous or stage races, in which participants run a different course each day, usually from a central staging location.Sled dog race was a demonstration sport at the 1932 Winter Olympics in Lake Placid. Then it was shown in Olslo in the Olympics several years later but it did not gain official event status. The dogs which are used to pull the sled with the driver are special trained powerful dogs, usually huskies. Dog sled racing is little unknown sport but still it's very exciting and fun to practice. I recommend that everyone should try it just once.