The American Birkebeiner Ski Foundation (ABSF) is a non-profit organization headquartered in Hayward, Wisconsin, promoting cross-country skiing and year-round outdoor sports. Best known for hosting North America's largest cross-country ski race, the foundation celebrates endurance, community spirit, and the natural beauty of the Northwoods. The ABSF is a key promoter of Nordic skiing and active outdoor lifestyles, providing opportunities for athletes of all ages and abilities to experience the thrill of competitive and recreational events on some of the best-groomed trails in the Midwest.

Signature Events

1. American Birkebeiner (Birkie) The American Birkebeiner, often called "The Birkie," is ABSF's flagship event and North America's largest cross-country ski race. Covering 50K for skate skiers and 55K for classic skiers, the race traverses the challenging terrain of northern Wisconsin, from Cable to Hayward. Inspired by a historic Norwegian race of the same name, the Birkie draws thousands of skiers worldwide, making it a bucket-list race for Nordic skiing enthusiasts. The event includes a full festival weekend with additional races, events, and community celebrations.
   1. Kortelopet Held during Birkie Week, the Kortelopet is a 29K race that provides skiers a shorter, yet still challenging, distance. Starting near Cable and finishing in Hayward, the “Korte” is ideal for intermediate skiers or those not yet ready for the full Birkie course. This race shares the same supportive, spirited atmosphere and draws a large crowd of skiers, from competitive racers to recreational participants.
   2. Prince Haakon Named after the legendary Norwegian prince, the Prince Haakon is a 15K ski race designed for beginners, families, and those new to Nordic skiing. Taking place on portions of the Birkie Trail, this race provides an accessible and enjoyable entry point into the world of cross-country skiing, capturing the thrill of the larger Birkie events in a more relaxed format.
2. Fat Bike Birkie Expanding its reach beyond skiing, the ABSF hosts the Fat Bike Birkie, the largest and most prominent fat-tire bike race in the country. On the snow-packed Birkie Trail, this event offers 47K and 21K race options, allowing cyclists to test their endurance and handling skills on winter trails. The Fat Bike Birkie draws competitive and recreational riders alike and has helped establish fat biking as a popular winter sport in the region.
3. Birkie Trail Run Festival The Birkie Trail Run Festival is a fall event offering a range of running distances, from a half marathon to a 100K ultra marathon. Set on the scenic Birkie Trail, the festival attracts trail runners from across the country who appreciate the technical, varied terrain of the Northwoods. With options for all skill levels, the festival celebrates trail running and the changing fall landscape, making it a popular event among outdoor enthusiasts.

The ABSF continues to promote healthy, active lifestyles and provide world-class trails for year-round recreation. Its events encourage people to get outdoors, challenge themselves, and be part of a vibrant, supportive community.