The most common variety of this rather bizarre sport is dog skijoring. The skier is pulled by dogs (usually between one and three), adding extra power to what his or her own legs and arms can do. Sprinters can hit speeds of 30 mph; the longest marathon race, the Road Runner 100, runs – you guessed it – 100 miles. The International Federation of Sleddog Sports, Inc. hosts Skijoring World Championships every other year; in 2011, the United States got its own national championship event, in Minneapolis.
Equestrian skijoring is the more adrenaline pumping version of the sport. Given the power of a horse compared to even a team of dogs, skiers don't do much to power themselves; mostly they just hang on. The extra speed makes events like the long jump possible- a 56′ jump off a ramp earned one competitor first place at the 2011 championships in Whitefish, Montana.