Ranked from data
Largest triathlons in Illinois
Triathlons in Illinois ranked by finishers in each race's most recent scored edition. Big fields mean closed roads, full aid stations, and a real race-day crowd.
11
races ranked
| # | Race | Where | Next date | Finishers | Median finish |
|---|---|---|---|---|---|
| 1 | Fox Lake Triathlon2026 edition | Fox Lake, Illinois | TBA | 161 | 1:26:25 |
| 2 | O'Town Hustle Super Sprint Triathlon2026 edition | O Fallon, Illinois | TBA | 106 | 1:08:16 |
| 3 | White Squirrel Triathlon2025 edition | Olney, Illinois | Aug 7, 2027 | 61 | 1:35:16 |
| 4 | Pioneer Spirit Triathlon - Sprint, Mini, & Challenge | 5k Run2026 edition | Petersburg, Illinois | TBA | 60 | 47:47 |
| 5 | JALC Tri-Festa Triathlon2026 edition | Carterville, Illinois | TBA | 55 | 1:29:52 |
| 6 | The Prairie Triathlon at NorthPointe2026 edition | Roscoe, Illinois | TBA | 52 | 1:54:54 |
| 7 | Saluki Triathlon2025 edition | Carbondale, Illinois | TBA | 38 | 52:59 |
| 8 | Tri To Help Sprint Triathlon2025 edition | Quincy, Illinois | TBA | 23 | 1:54:06 |
| 9 | Eiffel Tower Triathlon2026 edition | Paris, Illinois | TBA | 22 | 1:42:15 |
| 10 | Turkey Dri Tri Oak Brook Park District2025 edition | Oak Brook, Illinois | Nov 22, 2026 | 21 | 31:52 |
| 11 | Springfield Kids Triathlon2026 edition | Springfield, Illinois | TBA | 19 | 16:39 |