Illinois Triathlon Calendar 2025-2026

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Explore the best triathlons in Illinois for 2025-2026! Our updated list features 345 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

October 2025
Oct
25
Saturday

Screaming Pumpkin

2 mi 10 km 13 mi 26 mi
Oct
26
Sunday

Haunted Halloween Half Marathon

5 km 13 mi
Oct
26
Sunday

Endeavor Health Fraidycat 8k

5 km 8 km
Oct
26
Sunday

Sycamore Pumpkin 10k Run

10 km
Oct
26
Sunday

Allerton Park Trail Run

Trail Run 2 mi 5 mi
November 2025
Nov
1
Saturday

Theresa Tracy Trot

2 mi 4 mi
Nov
2
Sunday

Run The Path 10k

10 km
Nov
8
Saturday

Tunnel Hill 100 & 50 Mile Runs

Trail Run 50 mi 100 mi
Nov
15
Saturday

Storm the Castle 5K

5 km
Nov
15
Saturday

The Forge Trail Run Festival

Trail Run 10 km 20 km 30 km 60 km
Nov
22
Saturday

Art and Kevin Reveal Memorial Turkey Run

5 km 15 km
Nov
23
Sunday

Lincolnwood Turkey Trot 10K

5 km 10 km
Nov
27
Thursday

Thornton Turkey Trot

5 km
Nov
27
Thursday

The Fox & The Turkey Races

4 mi
Nov
27
Thursday

Bare Bones Turkey Trot

5 mi
Nov
27
Thursday

Oglesby Turkey Trot

3 mi
Nov
27
Thursday

St. Charles Turkey Trot

5 km
Nov
27
Thursday

Long Grove Turkey Trot 8K

5 km 8 km
Nov
27
Thursday

Grant Park Turkey Trot 10K

5 km 10 km
Nov
29
Saturday

Santas on the Run X 5k

5 km
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