February 26, 2026 - The Fat Bike Birkie is North America’s premier on-snow bike event. Riders test their skill and endurance on the professionally groomed American Birkebeiner Ski Trail, with options for every rider’s ability level. Choose from three epic distances: the Big Fat 47K race, the Half Fat 21K race, and the Fun Fat 10K Tour.

Conditions are looking great for Saturday’s event! The course has been holding up really well and should be fast and fun for the weekend. Stay tuned for updates on Friday’s pre-ride options given the current weather forecast. And the fun doesn’t stop after the finish lines – test equipment at the Birkie Fat Bike Expo and enjoy the post-race party!

Fat Bike Birkie is an Open-Class Bike Race
The Birkie Trail Staff groomers share the goal of providing a firm surface to ride on for the races. However, course conditions and weather can vary widely, from hard packed to soft powder snow. We recommend that participants be prepared to race in any course conditions. Just like in the Birkie Ski race, Fat Bike Birkie participants are free to choose different equipment based on the conditions of the course. Bikes should equipped with at least 3.5 inch wide tires, suitable to course conditions.

Please note, Class 1 fat bike e-bikes are allowed in the Fat Bike Birkie. At this time, e-bike riders will not be eligible for awards or results placement. You must notify registration@birkie.com or tell us at bike plate pickup if you are riding an e-bike.

Register now here to guarantee your shirt size, have a great race, and a fun party afterwards.