About Us

Arrowhead Ultra 135, Inc.

The Arrowhead 135 is recognized in the book "The World's Toughest Endurance Challenges" by Richard Hoad and Paul Moore as one of the 50 toughest races in the world.  It is a human powered Ultra Marathon taking place in the coldest part of winter in the coldest city in the lower 48 states.  Our average finish rate is 50%, the finish rate for new racers is much lower.

135 miles Deep Winter across Northern Minnesota on rugged, scenic Arrowhead State Snowmobile Trail from Frostbite I-Falls to Tower, MN Fortune Bay Casino. Pick mode of transport at start: bicycle, ski or foot.  This is our 10th year, beginning with 10 entrants in 2005 to ~135 starters 2013, featuring some of the best winter ultra-athletes in the world.  

Historically coldest gosh darn race anyplace even the Arctic, check average temps, virtually every year luck has us -30 to -40C/F, we have frostbite to prove it. Or it snows and is a sloppy mess! Arrowhead 135 is an organization of local folks dedicated to the promotion of human powered ultra-endurance events across beautiful Arrowhead Region of Northern Minnesota.  Our Race Mission is fostering national and international amateur endurance sports such as winter-biking, skiing and trail running. 

Goal of organization is to offer, fun, educational, yet challenging ultra-endurance event in extreme trail and weather conditions for economic and health benefit of communities in Northern Minnesota.

Race has costs for permits, insurance, T-shirts, awards, operational costs, etc. but we are hoping to minimize entry fees and break even.  Any Profits go to fine Special Operations Warrior Foundation Charity, providing college scholarships to children of US Spec Ops Soldiers killed and wounded, Minnesota Safe Families providing short-term respite to children in need, and we contribute to several snowmobile clubs along Arrowhead Trail. 

Ken and Jackie Krueger

Race Directors
Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it