Extreme North Dakota Twelve hOur Mountain Bike of Enduring Delirium (END-TOMBED)

Saturday, 28 October 2023


Race Summary

The Extreme North Dakota Twelve hOur Mountain Bike of Enduring Delirium - it's our annual epic halloween themed bike race.  Taking place in Turtle River State Park, the riders will ride solo or as part of a relay team to try to get in as many laps as possible in 6 or 12 hours.  The course has lots of windy single track, some fast double track, and even a smidgen of road riding (which you'll be loving by the end!).

Two Ways to Race

Zombie 6/12-Hour: Race solo for 6 or 12 hours to get the most number of laps of the course.

Skeleton Army 12-Hour: Race with a team of up to four people for 12 hours, alternating laps.


See Course Book

Date: Saturday, 28 October 2023
Zombies (12-Hour) and Skeleton Armies race 8:00 am to 8:00 pm.
Zombies (6-Hour) race 8:00 am to 2:00 pm.
Cap: Race will be limited to 100 total riders.
Race (click name to register) through Sep 15 September 16-October 15 After October 15
Zombie - 12 Hours $55 $65 $75
Zombie - 6 Hours $35 $40 $45
Skeleton Army - 12 Hours $35 per person $40 per person $45 per person

Youth (still under 18 on race day) save 50% during online registration.
UND and NCTC students save 25% during online registration. Email us from your school account to get a coupon code.

Online registration will close at 11:59 PM Thursday of race week. See course book for information about registering after that.
Refund Policy

Location: Turtle River State Park, near Arvilla, ND. You will need to purchase a day pass ($7) or have an annual ND State Park pass on your vehicle to enter.  Turtle River State Park has changed the classification of certain trails in the park, so please pay attention to signage when training and ride only where mountain bikes are allowed.
Entry Includes:  A stellar course, swag, results.
First 80 people to register for either Double Feature race get an ENDracing water bottle!

Categories: Division Zombie, Division 2 person Skeleton Army, Division 3/4 person Skeleton Army.
Scoring:  Zombies and Skeleton Armies are first ranked based on the number of laps completed (in under 12 hours) and then by the time in which the last lap was completed. Depending on conditions, 100 miles is a pretty hardcore benchmark to shoot for. A gravel grinder this isn't!
Other Details: This event forms part of the entry requirement into the Undead Hall of Fame.  In order to achieve Undead Hall of Fame status a racer must complete 100 miles in END-TOMBED and 50 miles (on foot) during END-TRAILS in the same weekend. Good luck. You're going to need it.
Past Races
Date Racers Results Photos Video Race Reports Press
2022-10-29 27 riders Results        
2021-11-06 9 riders Results        
2020-10-25 22 riders Results        
2019-10-26 18 riders Results     Course changes due to weather just before race, many people deferred.  
2018-10-27 59 riders Results     New trails! It was muddy!  
2017-10-28 70 riders Results Wes, Sarah      
2016-10-29 113 riders Results Wes   Lesley  
2015-10-24 106 riders Results     Jason  
2014-10-25 80 riders Results Photos PatCaleb LisaAuralee  
2013-10-26 110 riders Results Photos      
2012-10-27 100 riders Results PhotosMore Photos Aaron    
2011-10-29 76 riders Results Photos Video Minneapolis Musette  

Profits from this event--and all ENDracing events--will help support Ground Up Adventures, a 501(c)(3) non-profit based on North Dakota dedicated to helping kids get as much adventure as we wished we had growing up.