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50K races in Illinois

The 21 50K ultramarathons in Illinois, with each one's climb, cutoff and date. Every race links to its own page, where you can see how it fits the runner you are now.

RaceDistanceWhereDateClimbCutoff
Chicago Trail Running Festival50 KMBeecher, ILSep 12, 2026——
Rock Cut Hobo Trail Runs50 KMRockford, ILSep 13, 20262,100 ft8 h
Hindsight Ultra Trail Runs 50 km50 KMDixon, ILSep 26, 20262,000 ft25.5 h
The Hennepin Hundred - 50 km Run50 KMSterling, ILOct 3, 2026—20 h
Des Plaines River 50 km Trail Race50 KMLibertyville, ILOct 10, 2026—11.5 h
Shake Your Trail Feather Trail Run50 KMCharleston, ILOct 17, 20264,000 ft10 h
Fancy Nonsense 50 km Race50 KMWillow Springs, ILOct 24, 20262,800 ft9 h
Chicago Lakefront: Fall Version50 KMChicago, ILOct 31, 2026—9 h
Paleozoic Trail Runs - Cambrian Fall III50 KMWillow Springs, ILNov 7, 2026—9 h
Frozen Gnome 50K50 KMCrystal Lake, ILJan 9, 20274,100 ft8.5 h
Chicago Lakefront: Spring Version50 KMChicago, ILMar 27, 2027—9 h
Skunk Ape 80633.75 MilesDixon, ILMar 27, 2027—8.1 h
Earth Day 50k50 KMCrystal Lake, ILApr 17, 2027—8.5 h
Loud Thunder 50 km Race50 KMIllinois City, ILApr 17, 20274,000 ft12 h
Childish Nonsense 50 km Race50 KMPalatine, ILApr 24, 2027—9 h
Cry Me a River!50 KMChillicothe, ILJul 9, 20276,500 ft—
Road Warrior 50k54 KMCarol Stream, ILJul 17, 2027—9.5 h
Next Loop Endurance Series - Busse Woods IL50 KMElk Grove Village, ILAug 14, 2027—9 h
Shawnee Hills Trail Races50 KMOzark, ILAug 21, 20273,200 ft32 h
The Next Loop: Endurance Series - Half Day Forest Preserve, Il50 KMVernon Hills, ILAug 28, 2027—11 h
Temptation 200 Ultras50 KMForest City, ILSep 4, 20271,600 ft10 h