Illinois Triathlon Calendar 2025-2026

Header image

Explore the best triathlons in Illinois for 2025-2026! Our updated list features 348 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

April 2025
Apr
10-13
Th - Su

Potawatomi Trail Runs

Trail Run 10 mi 30 mi ... 150 mi 200 mi
Apr
11-12
Fr - Sa

Allerton Races

Trail Run 5 km 10 km 13 mi
Apr
11
Friday

Neighborhood Co-op Feed Your Neighbor 5K

5 km
Apr - Sep
12-6
Sa - Sa

Spring Chance BQ.2 Marathon

26 mi
Apr
12
Saturday

Donot Stop Half Marathon - Chicago

5 km 10 km 13 mi
Apr
12
Saturday

Southern Illinois Marathon

2 mi 10 km
Apr
12
Saturday

Forgotten Warrior Memorial 5k

5 km
Apr
12
Saturday

Wild Blossom Wine Run 5k

5 km
Apr
12
Saturday

BlueForCrewe 5k

5 km
Apr
12
Saturday

Valerie Stevens 10k Memorial Scholarship

5 km 10 km
Apr
12
Saturday

Morris Superhero Run

5 km 10 km
Apr
12
Saturday

Springfest 5K Run

5 km
Apr
12
Saturday

Going The Distance for the Salvation Army

5 km
Apr
12
Saturday

Fast & Furriest 5k Fun Run

5 km
Apr
12
Saturday

Tutus & Bowties 5K

5 km
Apr
12
Saturday

Run for 102 Race to the Finish

5 km
Apr
13
Sunday

I Raced The Law

5 km
Apr
13
Sunday

Run for the Dogs - Glenview

5 km
Apr
13
Sunday

Together We Tri Indoor Triathlon

Triathlon
Apr
13
Sunday

Stride for Sustainability 5K

5 km
Articles
The Beauty of the Easy Run — Why slowing down might be the smartest thing you do for your running
Mizuno Wave Rider 28: Elevating the Legacy of a Running Icon
Garmin Forerunner Review: Garmin Forerunner Series
Stride with Confidence: A Comprehensive Guide to Saucony Running Shoes