When the snow flies, fat bike racing takes over the upper Midwest, Mountain West, and Alaska. This is our list of fat bike races, sorted by state – winter classics like the Fat Bike Birkie, Tuscobia, and Fat Pursuit alongside local snow series – with the typical month and a link to each event’s official site. Updated through the winter season.
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Alaska (2)
- Iditarod Trail Invitational · Late February · ITI winter ultra (350/1000mi), Knik Lake AK start; late February (Feb 28, 2027).
- White Mountains 100 · March · White Mountains 100, near Fairbanks AK (Wickersham Dome); 100mi bike/ski/foot ultra, ~mid-to-late March 2026.
Colorado (2)
- Fat Bike Worlds · January · Leadville, CO. Borealis Fat Bike World Championships, the marquee North American on-snow fat-bike race and festival (11th edition in 2026).
- Fatbike World Championships · Winter (Jan–Feb) · Fat Bike World Championships, historically held in Crested Butte, Colorado in late January.
Idaho (1)
- Fat Pursuit · January · Fat Pursuit, Island Park ID; 30K/60K/200K winter ultra, ~Jan 8-10, 2027.
Michigan (2)
- 906 Polar Roll · February · 906 Adventure Team Polar Roll, Marquette MI; Mass Start Feb 21 and Ultra Feb 23, 2026.
- Fat-ish · January · Fat-Ish fat bike race, Ishpeming Michigan; short (7mi) and long (16mi) races, mid-January.
Minnesota (7)
- Arrohead 135 · January · Arrowhead 135, International Falls to Tower MN; 135mi winter ultra (bike/ski/foot), ~Jan 26, 2026.
- Fatbike Rennet · January · Hyland Lake Park Reserve, MN; 10K and 25K on manufactured snow loop, late January.
- Frozen Forty · January · Fatbike Frozen Forty, Elm Creek, Champlin MN; 40/30/20-mile groomed singletrack, late January.
- Norpine Fat Bike Classic · January · North Shore trails, Lutsen MN; ~Jan 9-10, 2026. Long Pine/Short Pine races, Dark Sky Tour.
- The Fat Vasa · January · Fat Vasa, Mora MN (Vasaloppet USA); ~Jan 11, 2026, ~12.5km and 25km.
- Cuyuna Whiteout · Late Jan–Feb · Cuyuna Lakes Whiteout, Crosby/Ironton MN; 10K/20K/30K on groomed singletrack, late winter.
- Fat Tire Loppet · Late Jan–Feb · Fat Bike Loppet, Minneapolis; ~Feb 1 2026 (festival Jan 31-Feb 1). Loppet/Puoli/Tour distances.
New York (1)
- IditaFAT · March · Winona Forest Recreation Area, NY; date moved to March 21, 2026 (hosted by Winona Forest Rec Assn).
North Carolina (1)
- US Open Fat Bike Beach Championships · March · Wrightsville Beach NC, Blockade Runner resort; oceanfront fat bike race, mid-to-late March.
Wisconsin (5)
- Hugh Jass Fat Bike Series · Winter · Southeast Wisconsin winter fat-bike race series across multiple venues.
- Fat Camp · January · Snow Crown Series Fat Camp; ~Jan 24, 2026 at Reforestation Camp, Suamico WI.
- Tuscobia 160 · Early January · Tuscobia Winter Ultra (160/80mi), WI; ~Jan 2-4, 2026 (Jan 1-3, 2027).
- Snow Crown Series · January-February · NE Wisconsin fat-bike series (Fatty Shack, Fat Camp, U.S. Fat Bike Open), since 2011.
- Fat Bike Birkie · March · Fat Bike Birkie, Cable/Hayward WI; held early-mid March (Mar 13, 2027).