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Triathlons in Illinois

Illinois has 24 upcoming triathlons scheduled for 2026. No single city dominates the calendar. Champaign leads with 3 races, followed by Evanston (3), Springfield (2), and Naperville (2). The remaining 58% of the calendar is spread across smaller cities. The list includes Chicago Triathlon in Chicago on August 15 — Olympic-distance triathlon.

Showing all 24

C-U Triathlon
Triathlon

C-U Triathlon

July 19, 2026
Champaign, IL
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Triathlon

C-U Triathlon YMCA

Champaign, IL

Triathlon

C-U Triathlon YMCA

July 22, 2026
Champaign, IL
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Triathlon

2026 Lake Springfield Triathlon

Springfield, IL

Triathlon

2026 Lake Springfield Triathlon

July 25, 2026
Springfield, IL
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Triathlon

Wauconda Kids Triathlon

Wauconda, IL

Triathlon

Wauconda Kids Triathlon

July 25, 2026
Wauconda, IL
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Lake Springfield Triathlon
Triathlon

Lake Springfield Triathlon

July 25, 2026
Springfield, IL
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Triathlon

2026 Naperville Sprint Triathlon

Naperville, IL

Triathlon

2026 Naperville Sprint Triathlon

August 1, 2026
Naperville, IL
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Triathlon

Booster Bash Tri & 5K

Salem, IL

Triathlon

Booster Bash Tri & 5K

August 1, 2026
Salem, IL
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Triathlon

MTC Zilla Tri

Columbia, IL

Triathlon

MTC Zilla Tri

August 2, 2026
Columbia, IL
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Triathlon

MTC Zilla Tri Youth Event

Columbia, IL

Triathlon

MTC Zilla Tri Youth Event

August 2, 2026
Columbia, IL
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Triathlon

2026 Naperville Sprint Triathlon

Naperville, IL

Triathlon

2026 Naperville Sprint Triathlon

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

White Squirrel Kids Triathlon

August 7, 2026
Olney, IL
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Sage City Triathlon
Triathlon

Sage City Triathlon

August 8, 2026
Monticello, IL
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White Squirrel Triathlon
Triathlon

White Squirrel Triathlon

August 8, 2026
Olney, IL
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Triathlon

SuperTri Chicago Triathlon

Chicago, IL

Triathlon

SuperTri Chicago Triathlon

August 15, 2026
Chicago, IL
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O'Town Hustle Super Sprint Triathlon
Triathlon

O'Town Hustle Super Sprint Triathlon

August 15, 2026
O Fallon, IL
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Triathlon

The Forge Gravel Triathlon

Lemont, IL

Triathlon

The Forge Gravel Triathlon

August 15, 2026
Lemont, IL
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North Shore Youth Triathlon
Triathlon

North Shore Youth Triathlon

August 16, 2026
Evanston, IL
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Triathlon

Chicago Triathlon

Chicago, IL

Triathlon

Chicago Triathlon

August 22, 2026
Chicago, IL
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Triathlon

North Shore Youth Triathlon

Evanston, IL

Triathlon

North Shore Youth Triathlon

August 22, 2026
Evanston, IL
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Carlyle Lake Triathlon
Triathlon

Carlyle Lake Triathlon

September 20, 2026
Carlyle Township, IL
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Tri The Illini
Triathlon

Tri The Illini

September 27, 2026
Champaign, IL
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Tri-State Warrior Run
Triathlon

Tri-State Warrior Run

October 25, 2026
Quincy, IL
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Turkey Dri Tri Oak Brook Park District
Triathlon

Turkey Dri Tri Oak Brook Park District

November 22, 2026
Oak Brook, IL
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Wildcat Indoor Triathlon
Triathlon

Wildcat Indoor Triathlon

February 21, 2027
Evanston, IL
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Triathlons in Nearby States

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Frequently asked questions

What are the standard triathlon distances?▾
The main distances are Sprint (750m swim, 20K bike, 5K run), Olympic (1.5K swim, 40K bike, 10K run), Half-Ironman/70.3 (1.2mi swim, 56mi bike, 13.1mi run), and full Ironman (2.4mi swim, 112mi bike, 26.2mi run). Browse all distances on RACE.
What do I need for my first triathlon?▾
At minimum you need a swimsuit, goggles, a road or tri bike, helmet, running shoes, and a race belt for your number. Many beginners start with a sprint triathlon, which can be completed in 1-2 hours.
What is the difference between sprint and Olympic triathlon?▾
A sprint triathlon is roughly half the distance of an Olympic triathlon. Sprints typically take 1-1.5 hours while Olympic distance races take 2-3.5 hours. Sprints are ideal for beginners.
How do I qualify for the IRONMAN World Championship?▾
Athletes qualify by earning a slot at an IRONMAN-branded qualifying race. Each full IRONMAN event allocates slots to age group winners. The World Championship is held annually in Kailua-Kona, Hawaii.
What are the biggest triathlons in the US?▾
The SuperTri Chicago Triathlon is the largest single triathlon event with 8,000+ athletes. IRONMAN events in Texas, Florida, Lake Placid, and Arizona draw thousands. Escape From Alcatraz is a bucket-list race. Find them all on RACE.
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