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Half Marathons found in Illinois in September

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Half Marathons in Illinois in September 2025

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

Race Calendar: Half Marathons found in September

🚀Boosted

Spooky Sprint - Springfield

Springfield, Missouri
21 Sep 25
$18.83 - $48.28
🚀Boosted

Naperville Trails Half Marathon & 10K

Wheaton, Illinois
06 Sep 25
$51.74 - $123.74
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Naperville Trails Half Marathon & 10K

Wheaton, Illinois
06 Sep 25
$51.74 - $123.74

Spooky Sprint - Springfield

Springfield, Missouri
21 Sep 25
$18.83 - $48.28

Belleville Main Street Marathon & Half Marathon

Belleville, Illinois
27 Sep 25
$80.50 - $91.10

Stone Bridge Half Marathon and 5k

Roscoe, Illinois
27 Sep 25
$27.50 - $59.30
Showing 1-4 of 4 results