susitna 100
February 13-15, 2027
100 MILES.
3 WAYS TO RACE.
1 UNFORGETTABLE CHALLENGE.
The Susitna 100 is a 48‑hour winter endurance race through the remote winter terrain north of Anchorage. Racers travel between checkpoints along trails and long distances by bike, foot, or ski on snow machine and dog sled trails.
3 ways to travel
The trail doesn't care which division you're in. It cares if you’re up for the challenge and a little fun. Declare your division at sign-in. Same trail, same checkpoints, same 48-hour clock.
Bike
Navigate ever changing snow and trail conditions on a winter-ready bicycle.
Run
Cover 100 miles on foot while managing the cold, fatigue and extended time on the trail.
Ski
Ski the course using skate or touring skis across varied winter trail conditions.
THE COURSEExplore the Trail
The approximately 100-mile course covers six check points, beginning and ending at Happy Trails Kennels in Big Lake. It crosses frozen lakes, rivers, swamps, wooded trails, and portions of the historic Iditarod Trail.
Before race day:
susitna Racer Guide
Rules, required gear, checkpoint cutoffs, sign-in times and everything else you need before race day lives in the Racer Guide. Be sure to check it out before you make it to the starting line.
sPECTATORSFOLLOWING A RACER?
Checkpoints are small, remote, and staffed by volunteers focused on racers and race volunteers, not visitors. The trails remain open to public snowmachine and dog sled traffic during the event.
The best way to follow someone's race is online. Standings update from checkpoints as conditions allow, and a lot of families track their racer with a personal GPS device (like a SPOT tracker) for real time peace of mind. Updates may be delayed by weather or limited internet and cellular service.
Frequently Asked Questions
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Roughly 1,000 Susitna 100 trail stakes and reflective tape for night travel. Racers are responsible for staying on the marked route. Fifteen minutes without seeing one means turn around!
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Get to the nearest checkpoint. Race officials can evacuate you by snowmachine or plane; a fee applies.
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Unfortunately, no. The start/finish line is a working sled dog kennel, and dogs on course mean disqualification.
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Racers have 48 hours to complete the 100-mile course. Check the Course Overview or Racer Guide for specific time requirements.
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Yes. Every Susitna 100 racer must attend the mandatory gear check and pre-race meeting. Required equipment must pass inspection. Check the Gear Guide and Racer Guide for more information.
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How do I know where the trail is?
Roughly 1,000 Susitna 100 trail stakes and reflective tape for night travel. Racers are responsible for staying on the marked route. fifteen minutes without seeing one means turn around!Unfortunately, no. The start/finish line is a working sled dog kennel, and dogs on course mean disqualification.What if I need to drop out?
How long do racers have to finish?
Can I bring my dog?
Is required gear inspected?
Racers have 48 hours to complete the 100-mile course. Check the Course Overview or Racer Guide for specific time requirements.Yes. Every Susitna 100 racer must attend the mandatory gear check and pre-race meeting. Required equipment must pass inspection. Check the Gear Guide and Racer Guide for more information. Get to the nearest checkpoint. Race officials can evacuate you by snowmachine or plane; a fee applies.