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Illinois Ultramarathon Calendar 2026-2027

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Explore the best ultramarathons in Illinois for 2026-2027! Our updated list features 29 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

August 2027
Aug
21-22
Sa - Su

Shawnee Hills Trail Races

Trail Run 13 mi 50 km 100 km 100 mi
September 2027
Sep
3-5
Fr - Su

The Ultimate Suck

Obstacle Run 10 mi 25 mi 50 mi
Sep
4
Sa

Temptation 200 Ultras

Trail Run 10 km 50 km ... 150 km 200 km
Sep
11
Sa

The Last Boyscout

Backyard Ultra 4 mi
October 2027
Oct
2-3
Sa - Su

The Hennepin Hundred

Trail Run 50 km 50 mi 100 mi
Monthly updates for Illinois

Get new running races (and updates) in your inbox every month.
Oct
9-10
Sa - Su

Farmdale Trail Run

Trail Run 10 km Half Marathon ... 50 mi 100 mi
Oct
9
Sa

Des Plaines River Trail Races

Trail Run Half Marathon Marathon 50 km 50 mi
Oct
9-10
Sa - Su

Arrowhead Endurance Run

Backyard Ultra
Oct
23
Sa

Fancy Nonsense

Trail Run 5 mi 25 km 50 km
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