Hi Yvonne,
Where was this dogsled race? It's not the Iditarod? Wow, no Huskies! Those dogs look happy! Great photo!
The sled dog race was in Fairbanks. It was the GCI Open North American Championship, which is a three day aggregate time sprint race. They mush approximately 20 miles on Friday and Saturday and 30 on Sunday. The winner is determined by the total time it took to do all three days of racing.
They start and finish right in downtown Fairbanks on Second Avenue. The haul in tons of snow each night to groom the trail in town. The rest of the trail goes onto the Chena River and then off through a somewhat undeveloped area of town including the local sled dog racing association's course.
As for the breeds of dogs, they generally race with hybred mixes, to keep the dogs in or around 45-50 lbs. I was reading about the winner's breeding theory and he's been using Alaskan Huskies along with European pointer breeds. It is a very interesting sport.
Last year there was one dog team that was all matching huskies (like 16 of them). It was a beautiful sight! Here is a photo I took at that event: