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Half Marathons found in Illinois in May

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Half Marathons in Illinois in May 2026

Find A Race is the US's favourite event listings site. Check out our list of May 2026 Half Marathons in Illinois below.

Race Calendar: Half Marathons found in May

🚀Boosted

Red Cedar Trail Races at Giant City State Park

Makanda, Illinois
Sat 30 May 26
$33.77 - $71.20
🚀Boosted

Run for Mental Health 5K/10K/13.1 CHICAGO/EVANSTON

Chicago, Illinois
Sat 23 May 26
$32.80 - $48.70
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Hometown Half Marathon & 5k/10k - Greater Chicago

Chicago, Illinois
Sat 02 May 26
$20.83 - $46.28

Cinco De Mayo Run 5K/10K/13.1 CHICAGO/EVANSTON

Chicago, Illinois
Sat 02 May 26
$32.80 - $48.70

Sunrise Marathon 5K/10K/13.1 CHICAGO/EVANSTON

Chicago, Illinois
Sat 02 May 26
$32.80 - $48.70

Chicagoland Spring Marathon, Half Marathon & 10K

Schaumburg, Illinois
Sun 03 May 26
$45.99 - $179.99

Run for Mental Health 5K/10K/13.1 CHICAGO/EVANSTON

Chicago, Illinois
Sat 23 May 26
$32.80 - $48.70

Red Cedar Trail Races at Giant City State Park

Makanda, Illinois
Sat 30 May 26
$33.77 - $71.20
Showing 1-6 of 6 results