Extreme North Dakota Sandhills Ultra Run Experience (END-SURE)

23 March 2024, McLeod, ND

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.  


Before Feb 1 Feb 1-28 Mar 1 and on  
25K - Click here to register $45 $50 $55  
50K - Click here to register $60 $65 $70  
100K - Click here to register $70 $75 $85  
100M - No race 2024        

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: 23 March 2024

Start times will vary, with longer races starting earlier.

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
2024-03-23 46 started, 45 finished Results Mike   FB event, FB1, FB2  
2023-04-01 Canceled due to blizzard (interstates closed)          
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.

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.