Revision of Extreme North Dakota Sandhills Ultra Run Experience (END-SURE) from Fri, 03/31/2023 - 20:27

1 April 2023, McLeod, ND

8:27 PM Friday update (this email just went out):

END-SURE 2023 is canceled. Sorry folks. Conditions are deteriorating (have deteriorated) on the roads and the course, with no expectation that they will improve by race time tomorrow.
Please let other people know, in case they don't check their email on Friday nights.
Please check out our refund/transfer and cancellation policy for details about how that works. Your options are a) transfer to next year, b) transfer an equivalent $ credit toward another race this year, or c) get a refund of 75% of your entry fee. If we don't hear from you in about a week, we'll start processing that partial refund.
Thank you for your support by planning to come out to what is supposed to be a "mystery conditions" Spring race, but part of that ends up being conditions we can't control. Stay safe!


25K start in 2015, photo by Wes Peck.

A beautiful trail run with 50K & 100K, and options. 100K race (usually, but NOT in 2023) takes in the entire length of the Sheyenne National Grasslands section of the North Country Trail, SW of Fargo North Dakota.  Sections of wide open prairie, pockets of forest, and rugged, rolling 'sandhills' keep the race interesting.  This event is North Dakota's first ultramarathon.  


Status Before Mar 1 Mar 1 and on    
25K Click here to register $45 $55    
50K Click here to register $60 $70    
100K Click here to register $70 $85    
100M no race 2023        

Online registration closes 23:59:59 Wednesday of race week.  No race-day registration.
Capped at 120 total participants.
Refund Policy


Sheyenne National Grasslands, approx. 45 minutes SW of Fargo, ND.  Base at the NE trailhead/Jorgen's Hollow Campground (6147 154th Ave SE, McLeod, ND 58057).


Date: April 1st, 2023

  • 100K - 7 AM
  • 50K - 10 AM
  • 25K - 10 AM

See the course book for course and other race details.

New race director(s) in 2023! Tim retired after 2022. :-(

 Part of the UMTR Ultra Series. UMTR members receive a 15% discount on race entry in 50K, 100K, or 100M races. Email UMTR to get the discount code.


Distance Men Time Year Women Time Year
25 km Paul Shol 1:39 2015 Lisa Dunnigan 1:52 2017
50 km Paul Shol 3:53 2016 Mallory Richard 4:16 2017
100 km Marcel Thielke 9:30 2016 Candice McMackin 12:36 2017
100 mi Marcel Thielke 18:11 2017 Mary Horton 46:24 2018

Past Races

Year Racers Results Photos Videos Race Reports Press
2023 Roster          
2022-03-19 14 started, 14 finished 50K Results Mary      
2021-03-20 27 started, 25 finished (limited entries due to COVID-19) Results        
2020-03-21 Canceled due to COVID-19 concerns          
2019-03-23 45 started, 38 finished (weather) Results Tim Mary FB event, Mark  
2018-03-24 80 started, 78 finished (weather) Results     Joel, Strava 50K flyby Forum/WDAY
2017-03-18 101 started, 89 finished Results Jenn   Jess, NBtrailcmrunning, Toff  
2016-03-19 73 started, 67 finished Results Joel   Steve, John, Marcel, John, Dale  
2015-03-28 84 started, 83 finished Results, Wes   Steve  
2014-03-29 27 solo, 1 50K team Results Wes   JustinTim, Laura (prepost 1post 2)  
2013-03-16 32 solo, 1 50K team Results Wes   Eric (1,2), Dale  

Trail conditions in 2014, photo by Wes Peck.

Trail conditions in 2013, photo by Wes Peck.