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Triathlons in Illinois

Illinois has 27 upcoming triathlons scheduled for 2026. Most of the calendar falls in the warmer months: 24 of 27 races (89%) take place between May and September, with July (9 events) the busiest month. No single city dominates the calendar. Evanston leads with 3 races, followed by Springfield (3), Champaign (3), and Paris (2). The remaining 59% of the calendar is spread across smaller cities.

Triathlons by month in Illinois

Jul (9) · Jun (7) · Aug (6) · Sep (2) · Feb (1) · Oct (1) · Nov (1)

Notable Illinois events

  • Chicago TriathlonChicago, August 15 Olympic-distance triathlon

Showing 24 of 27

The Prairie Triathlon at NorthPointe
Triathlon

The Prairie Triathlon at NorthPointe

June 13, 2026
Roscoe, IL
Eiffel Tower Triathlon
Triathlon

Eiffel Tower Triathlon

June 13, 2026
Paris, IL

Triathlon

2026 Eiffel Tower Triathlon

Paris, IL

Triathlon

2026 Eiffel Tower Triathlon

June 13, 2026
Paris, IL

Triathlon

Tri2BeatMS Kids' Triathlon

Chillicothe, IL

Triathlon

Tri2BeatMS Kids' Triathlon

June 13, 2026
Chillicothe, IL
Tremont Triathlon
Triathlon

Tremont Triathlon

June 20, 2026
Tremont, IL
Northshore Youth Triathlon Clinic
Triathlon

Northshore Youth Triathlon Clinic

June 23, 2026
Evanston, IL

Triathlon

Tremont Triathlon

Tremont, IL

Triathlon

Tremont Triathlon

June 27, 2026
Tremont, IL
Lytle Park Tri
Triathlon

Lytle Park Tri

July 4, 2026
Mattoon, IL

Triathlon

2026 Lake Zurich Triathlon

Lake Zurich, IL

Triathlon

2026 Lake Zurich Triathlon

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

Springfield Kids Triathlon

July 11, 2026
Springfield, IL
MTC Zilla Tri
Triathlon

MTC Zilla Tri

July 12, 2026
Columbia, IL
C-U Triathlon
Triathlon

C-U Triathlon

July 19, 2026
Champaign, IL

Triathlon

C-U Triathlon YMCA

Champaign, IL

Triathlon

C-U Triathlon YMCA

July 22, 2026
Champaign, IL

Triathlon

2026 Lake Springfield Triathlon

Springfield, IL

Triathlon

2026 Lake Springfield Triathlon

July 25, 2026
Springfield, IL

Triathlon

Wauconda Kids Triathlon

Wauconda, IL

Triathlon

Wauconda Kids Triathlon

July 25, 2026
Wauconda, IL
Lake Springfield Triathlon
Triathlon

Lake Springfield Triathlon

July 25, 2026
Springfield, IL
White Squirrel Kids Triathlon
Triathlon

White Squirrel Kids Triathlon

August 7, 2026
Olney, IL
Sage City Triathlon
Triathlon

Sage City Triathlon

August 8, 2026
Monticello, IL
White Squirrel Triathlon
Triathlon

White Squirrel Triathlon

August 8, 2026
Olney, IL

Triathlon

SuperTri Chicago Triathlon

Chicago, IL

Triathlon

SuperTri Chicago Triathlon

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

O'Town Hustle Super Sprint Triathlon

August 15, 2026
O Fallon, IL
North Shore Youth Triathlon
Triathlon

North Shore Youth Triathlon

August 16, 2026
Evanston, IL
Carlyle Lake Triathlon
Triathlon

Carlyle Lake Triathlon

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

Tri The Illini

September 27, 2026
Champaign, IL

Triathlons in Nearby States

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.