For the 2015 Birkie, Kortelopet, or Prince Haakon (susan.kendrick@birkie.com. Thanks to all our Sponsors, including SWIX, Title Sponsor of the Swix American Birkebeiner and Birkie ski events, Feb. 19-22, 2015, as well as Advantage Emblem, Cabin Stop, FITS, GU Energy, Life Link lll, Madshus, Marshfield Clinic – Hayward Center, New Moon Ski & Bike, Nuun Hydration, and dozens of other businesses, organizations, and professional services.