The deadline for dog teams to sign up for the annual International Pedigree Stage Stop Sled Dog Race is still nearly three weeks away, but already the field is more than half filled. Currently 13 teams from Wyoming, Montana, Alaska, Minnesota, Colorado, Oregon and Alberta, Canada, are registered for the 2013 race, which begins in Jackson Hole, then will continue through parts of Wyoming, Montana and Idaho and dip down into Utah before finishing in Wyoming. Up to 25 international sled dog teams compete for significant purses in the dog-friendly event, which starts at the Jackson town square each year. This year, Race Organizer Frank Teasley says the race route is being changed to include segments in four states. Teasley says registrations picked up significantly when news got out about the new race course, and by race day, he says he anticipates a full roster. The IPSSSDR, the largest sled dog race in the lower 48 states and its unique, dog-friendly stage stop format has made it a popular mushing event attracting some of the world’s top competitors. The event is slated to run from January 25th through February second.