from $20
RegisterIllinois triathlons
Triathlons in Illinois
16 upcoming triathlons in Illinois listed by date, with cities, start times, and entry fees. Find a triathlon near you and register.
16
upcoming races
0
cities with 5+
1:26:45
typical finish
Other distances
January 2027
from $32
RegisterFebruary 2027
March 2027
from $45
RegisterMay 2027
Lake Lou Yaeger Triathlon
Litchfield, Illinois7:00 AM startOpen water swim
from $75
RegisterJune 2027
Tri-Shark Classic Triathlon & Duathlon
Hudson, Illinois8:00 AM startOpen water swim
from $79
RegisterTremont Triathlon
Tremont, Illinois7:00 AM startPool swim
from $40
RegisterJuly 2027
Lake Zurich Triathlon
Lake Zurich, Illinois6:45 AM startOpen water swim
Lake Springfield Triathlon
Springfield, Illinois7:00 AM startOpen water swim
from $75
RegisterAugust 2027
from $30
RegisterNaperville Sprint Triathlon
Naperville, Illinois7:00 AM startPool swim
from $70
Register
from $55
Register
from $65
RegisterSupertri Chicago Triathlon
Chicago, IllinoisOpen water swim
October 2027
from $50
RegisterTriathlon results in Illinois
From 7 triathlons with official results in the last two years, 595 finishers in all.
1:26:45
typical finish
n/a
typical pace
61
finishers in a typical race
1:33:21
women, typical finish
1:23:47
men, typical finish
under 1:12:58
the fastest tenth
Entry for upcoming triathlons in Illinois usually runs from $60 to $115, with a typical fee of $75 before processing fees.
Typical times are the middle finisher across these races, weighted by field size. School meets, stair climbs, and results with timing errors are left out.
Biggest triathlons in Illinois
- 1Fox Lake TriathlonFox Lake · 161 finishers in 2026
- 2O'Town Hustle Super Sprint TriathlonO Fallon · 106 finishers in 2026
- 3Last Chance TriMattoon · 66 finishers in 2026
- 4White Squirrel TriathlonOlney · 61 finishers in 2025
- 5Pioneer Spirit Triathlon - Sprint, Mini, & Challenge | 5k RunPetersburg · 60 finishers in 2026
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