Illinois
Illinois Triathlon Calendar 2025-2026
Explore the best triathlons in Illinois for 2025-2026! Our updated list features 17 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!
August 2025
The Booster Bash Triathlon & 5K, hosted by the Salem Wildcat Booster Club, takes place in Salem, Illinois, at the Salem Family Aquatic Center. This event features a sprint triathlon consisting of a 40..
The MTC Zilla Tri is a USAT-sanctioned sprint triathlon held annually in Columbia, Illinois, at Bolm-Schuhkraft Park. Open to athletes aged 14 and older, it features an adult sprint triathlon and a ne..
The Sage City Triathlon, held annually in Monticello, Illinois, offers events suitable for beginners and elite triathletes alike. The race features a Sprint Triathlon with a 300m swim, 13.5-mile bike,..
The Tri To Help Sprint Triathlon is held in Quincy, Illinois, at the Sheridan Swim Club. This sprint triathlon features a 400-meter pool swim, a 14-mile bike ride, and a 3.1-mile run. The event offers..
The White Squirrel Triathlon, held annually in Olney, Illinois, is a sprint/beginner triathlon welcoming athletes of all levels. The 14th edition takes place at Musgrove Park and Aquatic Center, featu..
The Forge Gravel Triathlon, held in Lemont, Illinois, is a unique short-course multi-sport event featuring a 540-yard open water swim in the spring-fed Forge Quarry, a 10-mile bike ride on crushed lim..
The O'Town Hustle Super Sprint Triathlon, held annually in O'Fallon, Illinois, features a 150-meter pool swim, a 10-mile bike ride through scenic rolling hills, and a fast, flat 2-mile run. The event..
September 2025
The CiderMan Sprint Triathlon takes place in Millstadt, Illinois, celebrating the fall season with a community-focused event inspired by traditional apple cider making. Hosted by Buttercup Ranch & Cre..
The Millstadt Parks Biathlon & 5K, held annually in Millstadt, Illinois, features a challenging biathlon consisting of a 5-mile run through scenic farmland followed by a 22-mile bike ride with high-sp..
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..
The Carlyle Lake Triathlon, held in Carlyle Township, Illinois, is an annual multisport event featuring a variety of race options including sprint and Olympic distance triathlons, relays, aquabike, du..
October 2025
The Castle Creek Triathlon, held at Lake Pleasant's Castle Creek Boat Ramp in Arizona, offers a challenging multisport experience set against the stunning Southwestern desert landscape. Participants c..
The Mattoon Last Chance Triathlon, held in Mattoon, Illinois, features a sprint-distance course starting and finishing at the Mattoon Area Family YMCA. The event includes a 275-yard indoor pool swim,..
The Trail Mix Off-Road Duathlon and Mountain Bike Race takes place at Atwood Park Trail System in Rockford, Illinois. This event features off-road courses with two distances for each discipline. The d..
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
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..
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