(Press release) Birkie, Korte, Prince Haakon, BirkieTour & Fat Bike Birkie Hayward, Wis. (April 25, 2017) – The American Birkebeiner Ski Foundation (ABSF) board of directors today announced that registration will open for the 2018 American Birkebeiner schedule of events on May 1, 2017. North America’s largest cross-country ski race, the Slumberland American Birkebeiner, is scheduled for Saturday, February 24, 2018, with the Kortelopet and Prince Haakon races slated for Friday, February 23, 2018. Additionally,...