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Ultra Marathons found in Illinois in Spring
View all ↓Ultra Marathons in Illinois in Spring 2025
Find A Race is the US's favourite event listings site. Check out our list of Spring 2025 Ultra Marathons in Illinois below.
Race Calendar: Ultra Marathons found in Spring
🚀Boosted
1000 Mile Challenge - 2025 Midwest
Edwardsville, Illinois
01 Jan 25 - 31 Dec 25
$31.74
🚀Boosted
Frontline OCR
Byron, Illinois
24 May 25
$69.90 - $117.60
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Frontline OCR
Byron, Illinois
24 May 25
$69.90 - $117.60
1000 Mile Challenge - 2025 Midwest
Edwardsville, Illinois
01 Jan 25 - 31 Dec 25
$31.74
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