However some dogs do even better in super-marathon races. For this we need a different type of dog. Consider the sled dogs like those that participate in the Iditarod sled race. These dogs are primarily Siberian Huskies or Alaskan Huskies (which are an unregestered breed that have been designed for speed and endurance). The Iditerod race goes from just outside of Anchorage Alaska to Nome, and it covers a distance of 1,161 miles (1,868 km). The dog teams in this race run up to 125 miles per day, often racing for up to 6 hours at a time, for 9-14 days, pulling a sled weighing over 100 kg. Furthermore, they run at full tilt in extremes of climate where the wind chill value can be -100 °F (-73.3 °C). The record for the Iditarod race is currently 8 days and 22 hours. A sled dog's typical racing pace averages between 10 to12 miles per hour (16 to19km/h), which means that every 6 hour running period he covers about 70 miles (112 km). These dogs keep this up for an average of 11 days! It is hard to imagine any other animal on land that could keep up that kind of pace.