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Triathlon Races in Illinois found

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Triathlon Races in Illinois 2025 - 2026

Illinois has a growing Triathlon scene. With miles of rolling hills, challenging forest trails and an abundance of rivers and lakes it has the perfect ingredients for beautiful and challenging racing.

Whether you’re a seasoned triathlete wanting to test yourself over a 70.3/half distance or ironman/full distance race or a beginner to the sport looking to try out a Super Sprint distance, Sprint distance or Olympic triathlon you’re in the right place. Whatever type of race you fancy you’ll find it in the Prairie state. You can choose your distance of choice across a diverse range of terrains from the city routes of Chicago to the beaches of Lake Michigan.

If its big crowds and big city racing you’re after then why not try the Chicago Triathlon, one of the largest triathlons in the world. If you fancy dipping your toe on a smaller scale how about a local tri like the Sage City Triathlon?

Whatever your goal, you’ll find the most comprehensive list of Triathlons in Illinois at findarace.

Check out our exhaustive 2025 - 2026 Illinois Triathlon calendar list below, and use our month, distance and terrain filters to find your next challenge.

Triathlon Races Illinois 2025 - 2026

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North Shore Youth Triathlon

Evanston, Illinois
17 Aug 25
$27.50 - $96.40
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The Forge Gravel Triathlon

Lemont, Illinois
16 Aug 25
$124.36 - $289.83
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White Squirrel Kids Triathlon

Olney, Illinois
08 Aug 25
Free - $27.50

Tri To Help Sprint Triathlon

Quincy, Illinois
09 Aug 25
$49.20 - $96.90

Sage City Triathlon

Monticello, Illinois
09 Aug 25
$75.20 - $117.60

White Squirrel Triathlon

Olney, Illinois
09 Aug 25
$69.90

The Forge Gravel Triathlon

Lemont, Illinois
16 Aug 25
$124.36 - $289.83

North Shore Youth Triathlon

Evanston, Illinois
17 Aug 25
$27.50 - $96.40

O'Town Hustle Super Sprint Triathlon

O Fallon, Illinois
23 Aug 25
$11.95 - $123.25

Tri The Illini

Champaign, Illinois
21 Sep 25
$64.60 - $122.90

Carlyle Lake Triathlon

Carlyle Township, Illinois
21 Sep 25
$81.66 - $241.79

Prairie State Cup

Dewitt, Illinois
04 Oct 25
$90.00

2025 Tri312 INDOOR TRIATHLON & DUATHLON SERIES

Chicago, Illinois
06 Feb 25 - 13 Dec 25
$47.64 - $80.50

Turkey Dri Tri Oak Brook Park District

Oak Brook, Illinois
23 Nov 25
$27.50
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