What kind of dogs are used in the Iditarod Dogsled Race?

If a musher is looking for speed they'll use mostly mutts who have many different breeds in their lineage and who have acclimated to the cold weather and running super long distances. If they just want to get to the finish line they'll use Huskies and Malamutes. The latter 2 are used more for power than speed, but the mixed breed dogs are bred for speed, power, and ease of training. Most mushers will have a few Huskies and Malamutes on their team to provide an extra "push", but past that an experience Iditarod racer will usually opt for mixed breeds.