Illinois
Illinois Triathlon Calendar 2025-2026
Explore the best triathlons in Illinois for 2025-2026! Our updated list features 21 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!
October 2025
The Mattoon Last Chance Triathlon is an exciting event taking place in Mattoon, Illinois, featuring a 275-yard indoor pool swim, a 12-mile bike ride, and a 3.1-mile run. All segments of the triathlon..
