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FAT BIKE WINTER ULTRA RACES

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Every single fat bike winter ultra race in the world. Interested in trying your first ultra? Start small and work your way up. Head below the event calendar to browse some learning resources. To submit an event, email info@thenxrth.com

FIND GLOBAL EVENTS BY LOCATION

GLOBAL EVENT CALENDAR

Jan 9, 2026

Island Park, ID

60 & 200 k

The Fat Pursuit is a 60k or 200k human-powered winter race on a network of groomed snowmobile trails in Island Park, Idaho. Groomed is relative.

Jan 10, 2026

Hinckley, MN

40 mi

Foot, ski, or bike—test your survival skills in the 40-mile St. Croix 40 Winter Ultra. Carry essential gear and complete skill tests through the cold night...

Jan 24, 2026

Geilo, Norway

50, 100, & 150 k

What ever your choice might be, it´s going to be an adventure!

Feb 14, 2026

Susitna, AK

100mi & 50 k

The Susitna 100 is a ski, foot, or bike race held on packed snowmachine and dog sled trails in the Susitna River valley, north of Anchorage...

Feb 22, 2026

Knik Lake, AK

350 & 1,000 mi

The race follows the historic Iditarod Trail over 1,000 miles from Anchorage to Nome. Racers on foot, skis, or fat bikes navigate harsh, remote terrain...

Feb 23, 2026

Marquette, MI

100 & 150 mi

Because you have been dreaming of a winter ultra that offers a ton of groomed bike specific singletrack, and we have it...

Mar 1, 2026

Överkalix, Sweden

185 & 500 k

The Montane Lapland Arctic Ultra will take place on snowmobile trails in Swedish Lapland. Start and finish is in the small town of Överkalix, in the Swedish province of Norbotten.

Mar 13, 2026

Pinedale, WY

103 mi

103 miles of winter wonderland, with over 9,000 ft elevation loss/gain. Self-sufficiency is key, as there are no drop bags, pacers, or cell service along the way.

LEARNING SERIES: INTRO TO WINTER FAT BIKE ULTRAS

What Is a Fat Bike Ultra?

Fat bike winter ultras are long distance fat bike events that take place often in extreme conditions during the coldest part of the year in the snow. Ultra distance winter fat bike events are typically longer or more extreme than typical fat bike races, or both. They have riders ride self-supported and may have required gear lists including sleeping bags and pads or required activities such as the ability to boil water to ensure that participants have the gear and expertise to survive during an emergency.

How to Get Started With Fat Bike Winter Ultras

The grandfather of winter ultras is the Iditarod Trail Invitational in Alaska with 350 and 1,000 mile options. It's extremely remote, traverses severe winter conditions, and is the most iconic and storied event in the ultra community. Many events have several distance options in order to work your way up in distance. The St. Croix 40 in Minnesota is an entry level winter fat bike ultra race that gives participants all the experiences of an ultra (overnight riding, water boil requirement, starting the race in a bivy)  while being on a shorter course with nearby support. With options covering the entire spectrum, you can try this discipline and work your way up to longer more extreme events.

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