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Upcoming Triathlons in Illinois

Find 39 upcoming events across the state

Chain of Rocks Bridge Duathlon
Triathlon
Price rises in 5 days

Chain of Rocks Bridge Duathlon

Granite City, IL
May 3, 2026
Duathlon
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Pioneer Spirit Triathlon - Sprint, Mini, & Challenge | 5k Run
Triathlon

Pioneer Spirit Triathlon - Sprint, Mini, & Challenge | 5k Run

Petersburg, IL
May 9, 2026
Sprint
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Lake Lou Yaeger Triathlon
Triathlon
Price rises in 13 days

Lake Lou Yaeger Triathlon

Litchfield, IL
May 17, 2026
OlympicSprintAquabike
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Capital City Biathlon & 5K
Triathlon

Capital City Biathlon & 5K

New Berlin, IL
May 23, 2026
Duathlon
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JALC Tri-Festa Triathlon
Triathlon

JALC Tri-Festa Triathlon

Carterville, IL
May 23, 2026
Sprint
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MMTT Youth Triathlon
Triathlon
Price rises in 12 days

MMTT Youth Triathlon

Geneva, IL
May 24, 2026
Youth
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Saluki Triathlon
Triathlon
Price rises in 2 days

Saluki Triathlon

Carbondale, IL
June 6, 2026
SprintDuathlon
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Solid Rock Triathlon
Triathlon

Solid Rock Triathlon

Morton, IL
June 6, 2026
Youth
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Tri-Shark Classic
Triathlon
Price rises in 3 days

Tri-Shark Classic

Hudson, IL
June 6, 2026
SprintDuathlon
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Tom's Try-athlon Oak Brook Park District
Triathlon
Price rises in 19 days

Tom's Try-athlon Oak Brook Park District

Oak Brook, IL
June 6, 2026
Youth
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Fox Lake Sprint Triathlon
Triathlon

Fox Lake Sprint Triathlon

Fox Lake, IL
June 7, 2026
Sprint
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The Prairie Triathlon at NorthPointe
Triathlon

The Prairie Triathlon at NorthPointe

Roscoe, IL
June 13, 2026
Sprint
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The Why Not Tri
Triathlon

The Why Not Tri

OAK BROOK, IL
June 13, 2026
Sprint
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Eiffel Tower Triathlon
Triathlon
Price rises in 18 days

Eiffel Tower Triathlon

Paris, IL
June 13, 2026
OlympicSprint
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Tri2BeatMS
Triathlon

Tri2BeatMS

Chillicothe, IL
June 13, 2026
Youth
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Tremont Triathlon
Triathlon

Tremont Triathlon

Tremont, IL
June 20, 2026
SprintSuper Sprint
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Ironman 70.3 Rockford Illinois
Triathlon

Ironman 70.3 Rockford Illinois

Rockford, IL
June 21, 2026
Half Iron
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Lytle Park Tri
Triathlon
Price rises in 55 days

Lytle Park Tri

Mattoon, IL
July 4, 2026
Sprint
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Springfield Kids Triathlon
Triathlon
Price rises in 25 days

Springfield Kids Triathlon

Springfield, IL
July 11, 2026
Youth
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Lake Zurich Triathlon
Triathlon

Lake Zurich Triathlon

Lake Zurich, IL
July 12, 2026
OlympicSprintAquabikeDuathlon
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MTC Zilla Tri
Triathlon
Price rises in 3 days

MTC Zilla Tri

Columbia, IL
July 12, 2026
SprintYouth
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Crystal Lake Aquathon - 2026
Triathlon

Crystal Lake Aquathon - 2026

Crystal Lake, IL
July 19, 2026
Aquathlon
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C-U Triathlon
Triathlon

C-U Triathlon

Champaign, IL
July 19, 2026
Sprint
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MMTT Splash and Dash - Geneva
Triathlon
Price rises in 76 days

MMTT Splash and Dash - Geneva

Geneva, IL
July 22, 2026
Youth
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Lake Springfield Triathlon
Triathlon
Price rises in 45 days

Lake Springfield Triathlon

Springfield, IL
July 25, 2026
Half IronOlympicSprintAquabike
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Wauconda Kids Triathlon
Triathlon

Wauconda Kids Triathlon

Wauconda, IL
July 25, 2026
Youth
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Wauconda Triathlon
Triathlon

Wauconda Triathlon

Wauconda, IL
July 26, 2026
OlympicSprint
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Naperville Sprint Triathlon
Triathlon

Naperville Sprint Triathlon

Naperville, IL
August 2, 2026
SprintDuathlonYouth
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White Squirrel Kids Triathlon
Triathlon

White Squirrel Kids Triathlon

Olney, IL
August 7, 2026
Youth
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Sage City Triathlon
Triathlon
Price rises in 95 days

Sage City Triathlon

Monticello, IL
August 8, 2026
SprintSuper Sprint
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White Squirrel Triathlon
Triathlon

White Squirrel Triathlon

Olney, IL
August 9, 2026
Sprint
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North Shore Youth Triathlon
Triathlon
Price rises in 50 days

North Shore Youth Triathlon

Evanston, IL
August 16, 2026
Youth
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Chicago Triathlon and Kids Tri
Triathlon

Chicago Triathlon and Kids Tri

Chicago, IL
August 22, 2026
OlympicSprintSuper SprintYouth
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Carlyle Lake Triathlon
Triathlon
Price rises in 8 days

Carlyle Lake Triathlon

Carlyle, IL
September 20, 2026
OlympicSprintAquabike
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Have Fun? You Won! Kids Triathlon
Triathlon

Have Fun? You Won! Kids Triathlon

Oswego, IL
September 27, 2026
Youth
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Tri The Illini
Triathlon
Price rises in 34 days

Tri The Illini

Champaign, IL
September 27, 2026
Sprint
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Prairie State Cup
Triathlon

Prairie State Cup

Dewitt, IL
October 3, 2026
Sprint
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Turkey Dri Tri Oak Brook Park District
Triathlon
Price rises in 126 days

Turkey Dri Tri Oak Brook Park District

Oak Brook, IL
November 22, 2026
Dry Tri
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Wildcat Indoor Triathlon
Triathlon
Price rises in 187 days

Wildcat Indoor Triathlon

Evanston, IL
February 21, 2027
Super Sprint
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Finding the Right Illinois Triathlon

Whether you are looking for a beginner-friendly Sprint in Illinois or a challenging 70.3, Let's Race provides the most up-to-date calendar for triathletes. Our Illinois list is updated daily to include Ironman, Olympic, and local club races.