12 Hours Ultra Running Events in Michigan

All 50 KM 50 Miles 100 KM 100 Miles 6 Hours 12 Hours 24 Hours

Date	Event	City	Distances
06/20/26	Wicked Worm	Grand Rapids	6 Hours , 12 Hours
10/10/26	The Ultra Bird 12hr and 6hr Trail Races	West Olive	6 Hours , 6 Hours , 12 Hours
10/17/26	Hootenanny Endurance Run	Gregory	Backyard , 4 Hours , 8 Hours , 12 Hours
05/29/27	Back 9 Endurance Run	Copper Harbor	12 Hours , 24 Hours

Date	Event	City	Distances
11/01/25	Cal Crusher	Caledonia	12 Hours , 30 Hours
06/07/25	Island Time	Gregory	6 Hours , 12 Hours , 24 Hours
06/24/23	Loopty Loop Ultra	Rochester Hills	4 Hours , 8 Hours , 12 Hours
05/06/23	Ode to the Night	Holly	Backyard , 12 Hours
08/06/22	The Gnarly Gnome Loopty Loop	Afton	8 Hours , 12 Hours
06/25/22	24 Hour Summer Stampede Ultra	Coopersville	6 Hours , 12 Hours , 24 Hours
06/11/22	Twilight Zone 24 Hour Endurance Run	Leonard	6 Hours , 12 Hours , 24 Hours
04/30/22	Lappers Delight 24 Hour	Milford	6 Hours , 12 Hours , 24 Hours
10/27/18	Bad Apple Ultra	Greenville	3 Hours , 6 Hours , 12 Hours