Extreme North Dakota Twelve hOur Mountain Bike of Enduring Delirium - END-TOMBED 2026

The Extreme North Dakota Terrifying Run Amongst Innumerable Lost Souls is an annual Halloween-themed trail run. It takes place in Turtle River State Park. Runners can compete solo or as part of a relay team, aiming to complete as many laps as possible within 6 or 12 hours. The course features winding single track, fast and flat double track, rolling hills, and approximately 100 yards of pavement. The event offers three race formats: Zombie (6, 12, or 24-hour solo race for most laps), Skeleton Army (12 or 24-hour team race for up to four people, alternating laps), and Imp (a ~10k solo trail run for one lap).