Illinois
Illinois Triathlon Calendar 2026-2027
Monthly updates for Illinois
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Illinois for 2026-2027! Our updated list features 19 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!
September 2026
Downtown Moline adventure triathlon with a 2.5 mile paddle, 7.5 mile bike and 2 mile run over the I 74 Bridge plus individual, team and corporate divisions.
A biathlon with a 5 mile run and 22 mile bike plus a separate 5K run in Millstadt on Sept 13, 2026 with post race food and yoga; proceeds support the Park Fund.
A community race day in Morrison, Illinois with a 5K out-and-back, a duathlon including a 21-mile bike, children's fun runs, and a color run; courses start at Morrison High School and include rolling hills and on-course water stops.
Experience a beach start at Illinois largest man made lake followed by a flat bike course and a finish over the dam spillway. This event offers individual and relay options across triathlon duathlon and aquabike distances.
A sprint triathlon at the University of Illinois combining a 300 meter pool swim, a 14 mile bike and a 5 kilometer run. Packet pickup is offered the day before and race morning and the event follows USA Triathlon rules.
Monthly updates for Illinois
Get new running races (and updates) in your inbox every month.
October 2026
A draft legal collegiate sprint triathlon for NCAA women at Clinton Lake SRA with a 750 meter swim, 12 mile bike and 3.2 mile run.
A pool-to-road triathlon at the Mattoon Area Family YMCA with a 275 yard swim, 12 mile bike and 3.1 mile run; individual and team entries and age-group awards.
Off road duathlons and mountain bike races at Atwood Park with professional chip timing, on site meal, and proceeds supporting local trail building.
A Peoria Heights 5K and Teal Pumpkin Festival raising food allergy awareness with in-person and virtual race options plus a free family-friendly festival.
November 2026
An indoor triathlon at Oak Brook Park District on November 22 featuring rowing, indoor cycling and a short run for participants aged 12 and up.
February 2027
Experience an indoor triathlon in Evanston where distance is the goal. Complete a ten minute swim, twenty minute bike, and fifteen minute run to qualify for the U.S. Collegiate Club Triathlon Nationals.
Indoor dry triathlon at the Neal Center YMCA featuring a 10 minute row, 20 minute bike and 15 minute treadmill walk or run with staggered wave starts.
May 2027
Lake Lou Yaeger Triathlon in Litchfield Illinois offers sprint and Olympic options with a beach swim, scenic bike and lake run. The USAT sanctioned event includes packet pickup, on course support, awards and a finish line festival.
June 2027
A Rockford, Illinois triathlon on June 13, 2027 featuring a Rock River swim, scenic bike on rural roads and a flat trail run, with World Championship qualification available.
July 2027
Multi-distance triathlon at Lake Springfield on July 25, 2026, with dock swim starts, revised bike routes, relay options, and a finish-line festival with awards and food.
Annual multi sport event in Lake Zurich, IL offering Olympic and Sprint triathlon distances plus a duathlon at Paulus Park; sanctioned by USA Triathlon.
A multi event day in Rockford, Illinois on July 18, 2027 featuring an 18 mile duathlon, a 2 mile run, and a 2 mile ruck with specified loads. A short free post race fitness challenge is included for participants.
August 2027
A multi-distance triathlon at Centennial Beach in Naperville on August 1, 2027 offering swim, bike and run options plus duathlon, aquabike and a kids race.