Fat Bike Birkie
March 8, 2025
The Fat Bike Birkie is the premier on-snow bike event in North America. Riders test their skill and endurance on the professionally groomed American Birkebeiner Ski Trail, with options for every rider’s ability level. The event has three distances: the Big Fat 47km race, the Half Fat 21km race, and the Fun Fat 10km Tour. The fun doesn’t stop after the finish lines – riders test equipment at the Birkie Fat Bike Expo, and enjoy live music and food at the post-race party.
Fat Bike Birkie is an Open-Class Bike Race
The Birkie groomers are some of the best in the world and have the goal of providing a firm surface to ride on for the races. However, we cannot control the weather and the course conditions can vary widely, from hard packed to soft powder. Just like in the Birkie Ski race, Fat Bike Birkie participants are free to choose different equipment based on the conditions of the course. We recommend that participants be prepared to race in any course conditions. Bikes should equipped with at least 3.5 inch wide tires, suitable to course conditions.
E-bikes are not allowed for any event of the Fat Bike Birkie.
No special equipment classes will be recognized in the Fat Bike Birkie results or awards. Tandems bikes are allowed, but there is not a special class and will not be eligible for awards. Each tandem rider must register and contact registration@birkie.com to ensure the proper results are shown.
Event Distance Options
The Big Fat 47K Race
The Half Fat 16K Race
The Fun Fat 10K Tour
REGISTER HERE: https://runsignup.com/Race/WI/Cable/FatBikeBirkie
