Illinois
Illinois Triathlon Calendar 2025-2026
Explore the best triathlons in Illinois for 2025-2026! Our updated list features 11 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!
September 2025
The Harvest Hammer Duathlon, held in Morrison, Illinois, offers a dynamic race experience featuring a 5K run and a 21-mile bike ride for duathletes, with options to participate solo or as part of a te..
Tri The Illini is a USA Triathlon–sanctioned sprint triathlon held on the University of Illinois at Urbana-Champaign campus in Champaign, Illinois. The course features a 300-meter pool swim, a fast, f..
October 2025
Mattoon Last Chance Tri is a modest triathlon in Mattoon, Illinois, totaling about 15 miles: a 275-yard indoor pool swim, a 12-mile bike ride, and a 3.1-mile run. All segments start and end at the Mat..
Trail Mix Off-Road Duathlon and Mountain Bike Race takes place at Atwood Park Trail System, Rockford, Illinois. It combines an off-road duathlon and a mountain bike race: Duathlon—2-mile run, 10-mile..
November 2025
The Turkey Dri Tri, hosted by Oak Brook Park District in Oak Brook, Illinois, is a beginner-friendly triathlon for ages 12 and up. It features three short disciplines: 2000-meter row on Concept 2 rowe..
February 2026
The YMCA Dry Tri, held at the Neal Center YMCA in Toledo, Illinois, offers a unique indoor triathlon experience. Participants complete three legs without getting wet: a 10-minute row on Concept II row..
June 2026
IRONMAN 70.3 Rockford in Illinois is a community-driven triathlon held in Rockford. The course follows the standard 70.3 distances: a 1.2-mile swim in the Rock River, a 56-mile bike through rural Illi..
The Fox Lake Sprint Triathlon, organized by Race Production by Trudy, is a USAT-sanctioned event held at Lakefront Park in Fox Lake, Illinois. The sprint triathlon features a 0.5-mile (750 yards) lake..
Based at Tremont Community Pool in Tremont, the Tremont Triathlon offers a community sprint triathlon with clearly defined distances: a 0.25-mile swim (16 pool lengths), a 10-mile out-and-back bike le..
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