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Ultra Marathons found in Illinois in October

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Ultra Marathons in Illinois in October 2025

Find A Race is the US's favourite event listings site. Check out our list of October 2025 Ultra Marathons in Illinois below.

Race Calendar: Ultra Marathons found in October

🚀Boosted

Sweet Ride | Bike • Run • Walk

Willow Springs, Illinois
04 Oct 25
$32.80 - $54.00
🚀Boosted

1000 Mile Challenge - 2025 Midwest

Edwardsville, Illinois
01 Jan 25 - 31 Dec 25
$52.94
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1000 Mile Challenge - 2025 Midwest

Edwardsville, Illinois
01 Jan 25 - 31 Dec 25
$52.94

Sweet Ride | Bike • Run • Walk

Willow Springs, Illinois
04 Oct 25
$32.80 - $54.00
Showing 1-2 of 2 results