Events
Race Directors

50 KM Ultra Running Events in Illinois

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

Upcoming Events

Date Event City Distances
08/08/26 Next Loop Endurance Series - Deer Grove East Palatine 50 KM
08/15/26 Next Loop Endurance Series - Busse Woods IL Elk Grove Village 50 KM
08/22/26 Shawnee Hills 100 Ozark 50 KM , 100 KM , 100 Miles
08/29/26 The Next Loop: Endurance Series - Half Day Forest Preserve, Il Vernon Hills 50 KM
09/05/26 Temptation 200 Ultras Forest City 50 KM , 100 KM , 150 KM , 200 KM
09/12/26 Chicago Trail Running Festival beecher 50 KM
09/13/26 Rock Cut Hobo Trail Runs Rockford 50 KM
09/26/26 Hindsight Ultra Trail Runs Dixon 50 KM , 100 KM , 100 Miles
10/03/26 The Hennepin Hundred Sterling 50 KM , 50 Miles , 50 Miles , 100 Miles
10/10/26 Des Plaines River Trail Races Vernon Hills 50 KM , 50 Miles
10/17/26 Shake Your Trail Feather Trail Run Charleston 50 KM , 100 KM
10/24/26 Fancy Nonsense 25k/50k Willow Springs 50 KM
03/27/27 Chicago Lakefront: Spring Version Chicago 50 KM
04/24/27 Childish Nonsense Palatine 50 KM , 50 Miles

Past Events

Date Event City Distances
07/17/26 CMAR Trail Races Chillicothe 50 KM , 50 Miles , 100 Miles
07/17/26 Cry Me a River! Chillicothe 50 KM , 50 Miles , 100 KM , 100 Miles
04/18/26 Loud Thunder 50 Illinois City 50 KM , 50 Miles
04/18/26 Earth Day 50K Crystal Lake 50 KM
01/10/26 Frozen Gnome Crystal Lake 50 KM
12/06/25 Arctic Frog Run (IL) Libertyville 50 KM
11/08/25 Paleozoic Trail Runs - Cambrian Fall III Willow Springs 50 KM
11/01/25 Chicago Lakefront: Fall Version Chicago 50 KM , 50 Miles
08/27/25 United Center Challenge Chicago 50 KM
04/20/24 Zoomies 50K Aurora 50 KM
03/23/24 Paleozoic Trail Runs - Devonian Spring II Chicago 50 KM
09/03/23 St. Jude Runs - Kilometers for Kids 10 x 5k Quincy 50 KM
08/19/23 Illiniwek Race The Night Hampton 50 KM
10/23/21 Outer Belt Ultras Chicago 50 KM , 50 Miles , 100 KM , 100 Miles , 210 Miles
09/18/21 Forge Ultra 50K Lemont 50 KM
03/20/21 Paleozoic Trail Runs - Silurian Spring II Palo Park 50 KM
11/09/19 Paleozoic Trail Runs - Cambrian Fall II Palos Park 50 KM
09/28/19 Oak Point Trail Run Golconda 50 KM
10/20/18 Ondessonk Trail Races Ozark 50 KM
09/15/18 Evergreen Lake Ultras Hudson 50 KM , 34 Miles , 51 Miles , 100 KM
03/25/17 Paleozoic Trail Runs - Carboniferous Spring Wood Springs 50 KM
11/12/16 Paleozoic Trail Runs - Silurian Fall Palos Park 50 KM
11/14/15 Paleozoic Trail Runs - Permian Fall Wood Springs 50 KM
10/18/14 Forest Glen Trail Run Westville 50 KM
11/16/13 Paleozoic Trail Runs - Carboniferous Fall Palos Park 50 KM
04/14/12 McNaughton Park Pekin 30 Miles , 50 KM , 50 Miles , 100 Miles , 150 Miles
01/14/12 Frosty Fifty Crystal Lake 50 KM , 50 Miles
12/18/10 Deer Grove FA50 Palatine 50 KM
10/23/05 DeTonty Willow Springs 50 KM
12/19/82 Running Central Ultra Challenge East Peoria 50 KM

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Silverheels Trail Runs
Fairplay, CO - 52 finishers
60 KM
Devil's Gulch
Wenatchee, WA - 82 finishers
100 Miles | 50 Miles
Thumbs Up Summer Slam
Estes Park, CO - 0 finishers
12 Hours
Dances with Dirt - Devil's Lake
Baraboo, WI - 166 finishers
50 Miles | 50 KM
Carolina Reaper Challenge
Greenville, SC - 80 finishers
50 KM
Eastern Legend
Gilmer, TX - 5 finishers
50 KM
First Blaze Trail Race
Milton, ON - 70 finishers
50 KM
Spaulding Woods 50K
Northfield, NH - 52 finishers
50 KM
Kaslo Wild Ultra
Kaslo, BC - 52 finishers
52 KM
Get Your Butt Kicked @ Route 66
Eureka, MO - 37 finishers
6 Hours
View All Results