On the World Famous Birkie Trail in Cable, Wisconsin!
American Birkebeiner Trailhead Map

The 45NRTH 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!

Three days of fun! Friday, March 9 – Check out the Fat Bike Birkie EXPO and Fat Bike Demos, and ride the Criterium course!  March 10 – Race day, Post-Race Party in the Great Hall, and CAMBA After Party at the Sawmill Saloon in Seeley, WI, with Big Prize Giveaways and a Silent Auction from Fat Bike Birkie Sponsors!  March 11 – Guided singletrack ride by CAMBA and fat bike demos at the “OO” Trailhead.

2017 Fat Bike Birkie Photo Gallery »

Tempur-Pedic = Free Birkie Entry!

Fat Bike Birkie is an Open-Class Bike Race

There are no restrictions the specific tire size allowed. 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 condition, on a bike equipped with at least 3.5 inch wide tires.

No special equipment classes will be recognized in the Fat Bike Birkie results or awards

Event/Distance Options

49K “Big Fat” Fat Bike Race

21K “Chico” Fat Bike Race

Friday Evening Criterium

  • Kids: 10-14 years old
  • Novice: 15 minutes + one lap
  • Expert: 25 minutes + one lap


2018 Registration Now Open!

 May 1 to September 7September 8 to December 14December 15 to February 2After February 2
47 Km or 23 km Race$65$75$85$95

All long race participants must be at least 18 years of age on race day. All short race participants must be at least 13 years of age.
This event has a participant cap of 1200.

Protect Your Registration!

Get reimbursed up to 100% on your Fat Bike Birkie registration if you can’t compete for a number of reasons including:

  • A covered illness or injury
  • Pregnancy
  • You have a traffic accident en route to your event
  • Your car breaks down within 24 hours of the event
  • One of the many other covered reasons

Event Registration Protector also comes with Competition Care: a 24 hour assistance hotline that can give you race-day information, locate bicycle repair shops, find nearby equipment stores, and much, much more.

Add Registration Protection!

Schedule of Events

Three Full Days of Fat Bike Birkie!


Courses Open for Pre-Riding10:00 AM – 3:00 PM
Expo / Bib Pick-Up / Bike Demos / Birkie Store / Brats + Beer!10:00 AM – 7:00 PM
Novice Criterium: 15 minutes + one lap4:30 PM
Kid’s Criterium: 5 laps – ages 10 to 145:00 PM
Expert Criterium: 25 minutes + one lap5:30 PM


Bib Pick Up - In the Great Hall7:30 AM to 8:30 AM
47 km Fat Bike Birkie - The Big Fat9:00 AM
23 K Fat Bike Birkie - The Chico9:15 AM
Post-Race Party for All Participants--Fajitas! Plus your first beer is Free!
Spectators and families can purchase meal ticket for $5.00
11:00 AM to 3:00 PM
Bike Demos / Birkie Store / Brats + Beer!All Day
After Party hosted by CAMBA at the Sawmill Saloon,
Seeley, WI. Raffle prizes and silent auction from Fat Bike
Birkie Sponsors! See more at CAMBA online and at Expo booth.
4:00 PM to 8:00 PM


Bike Demo at the Highway OO Trailhead9:00 AM - 12:00 Noon
CAMBA Guided Singletrack Rides at the Highway OO TrailheadStarts at 10:00 AM

Fat Bike Expo & Bib Pick Up

fbb-demoAvoid the race morning rush and pick up your bib at the Fat Bike Expo located in the Great Hall at the Birkie Trailhead. Open from 10:00 am to 7:00 pm on Friday, March 10.

  • Fat Bike Birkie EXPO — Great Gear and Guidance from FBB Sponsors
  • Fat Bike Demos All Day
  • The Birkie Store, with Great Birkie Merchandise
  • See CAMBA Raffle Prizes / Silent Auction Items from Fat Bike Birkie Sponsors
  • Brats + Beer Outside by the Bike Demos and Fire Pits
  • Free Coffee from Hayward Coffee Company

Race Day Bib Pick up available on Saturday from 7:30 to 8:30 am.

Course Information

Races will start and finish at the American Birkebeiner Trailhead in Cable, WI.

Check out the Trail Genius coverage of the 2015 FBB below – The 2017 race will feature a slightly different course, however these videos and maps give you a good idea about the trail and terrain.

Start Gates

The “Big Fat” Fat Bike Birkie will feature 4 start gates. Riders will be placed in one of these gates based on their finish time from the long race of the 2016 Fat Bike Birkie. Riders without a previous result will be assigned to Gate 4.

There will not be any gate assignments for the shorter Chico race.

Friday Fat Criterium

  • 1 km terrain course looping through the Birkie Trailhead.
  • Cash Prize for the Expert Race!
  • Registration is $10 online (registration link below), youth race is free
  • Bib pickup is located inside the Great Hall.
  • Field limit is 50 riders per race.

Beginner/Novice: 4:30PM  | 15min  + 1 lap

Youth Race: 5:00PM  | 5 laps |  Ages 10-14

Expert/Advanced: 5:30PM  | 25min  + 1 lap |  3-deep; $150, $75, $50 (Men & Women)


fbb-podiumFat Bike Birkie Overall Trophies will be presented to the first three male & female finishers of both races.
Cash Prizes for the first three men & women in the “Big Fat”  $500 | $250 | $100

Winners must be present at award ceremony to receive the cash prize.

Age-class Awards will be given to the 1st, 2nd and 3rd place riders, male and female, in each age class for the Fat Bike Races.

  • Big Fat – 18-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80+
  • Chico – 13-17, 18-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80+


Title Sponsor

Presenting Sponsor

Clif Bar
BeFAST Sportgear
Maxxis Tires
Magura USA
Bemer Group


Want to get involved, see this event up close and personal, and be part of what makes Birkie events great? We’d love to hear from you! Contact the Birkie at 715-634-5025 x:2 or Click HERE for available shifts.   There is no obligation—we’re happy to answer your questions. Contact us today!


Please contact us with any questions at birkie@birkie.com or 715-634-5025