TriathlonIllinois
Triathlon in Illinois
Browse upcoming amateur triathlon events and compare dates, locations, and popularity. in Illinois.
Upcoming dates Illinois Community-rated events
Events listed
73
Sport
Triathlon
Area
Illinois
Radius
350 km
This calendar in numbers
This calendar currently lists 73 upcoming events, from Jul 11, 2026 to Feb 21, 2027. August is the busiest month, with 33 events scheduled. Events are spread across 49 different locations; Wauconda hosts the most (5).
Browse all 73 events by date
July 2026
- 2026 St. Luke's New Town Triathlon Jul 11
- Ironman 70.3 Muncie Jul 11
- IRONMAN 70.3 Muncie Jul 11
- IRONMAN 70.3 Muncie Jul 11
- La Porte Triathlon Jul 11
- PLAYTRI - IRONMAN 70.3 MUNCIE Jul 11
- St. Luke's New Town Triathlon Jul 11
- 2026 Tri-State Tour Chicago Century #1 powered by Bicycle Illinois Jul 12
- IRONMAN 70.3 Musselman Jul 12
- Kids Triathlon - South Bend Jul 18
- Ballwin Triathlon Jul 19
- Ballwin Triathlon Jul 19
- C-U Triathlon Jul 19
- Taste of Triathlon Swim Jul 21
- Taste of Triathlon Swim Jul 22
- Taste of Triathlon Swim Jul 23
- 2026 Wawasee Kiwanis Sprint Triathlon Jul 25
- Lake Country Triathlon Jul 25
- Lake Springfield Triathlon Jul 25
- Tri-ing for A Cure Triathlon Jul 25
- Wauconda Kids Triathlon 2026 Jul 25
- Wawasee Kiwanis Triathlon Jul 25
- Tour de Kirkwood Triathlon Jul 26
- Tri-Ing for a Cure Triathlon Jul 26
- Wauconda Triathlons 2026 Jul 26
August 2026
- Muscatine Triathlon | Presented by Sqwincher Aug 1
- White Squirrel Kids Triathlon Aug 6
- 2026 USA Triathlon Draft-Legal Sprint National Championships Aug 7
- USA Triathlon Nationals Aug 7
- -TRI Columbus Aug 8
- 2026 USA Triathlon Mixed Relay National Championships Aug 8
- 2026 USA Triathlon Olympic-Distance National Championships Aug 8
- Lake Max Triathlon and Duathlon Aug 8
- Oregon Kids Triathlon Aug 8
- TOSA Youth Tri Aug 8
- White Squirrel Triathlon Aug 8
- YMCA of Washington County Triathlon Aug 8
- 2026 USA Triathlon Sprint National Championships Aug 9
- John Seidler Memorial Kids Triathlon Aug 15
- Tri 4 Schools Middleton Kids Triathlon Aug 15
- 2026 The Inkwell Clayton Kids Triathlon Aug 16
- C26 Youth Triathlon Aug 16
- C26 Youth Triathlon Fort Wayne Aug 16
- The Inkwell Clayton Kids Triathlon Aug 16
- Janesville Kids Triathlon Aug 21
- 2026 Chicago Triathlon Aug 22
- 2026 Supertri Chicago Aug 22
- 2026 Tri-State Tour Chicago Century #2 powered by Bicycle Illinois Aug 22
- 370 Lakeside Triathlon Aug 22
- Barron Lake Kids Triathlon Aug 22
- Barron Lake Triathlon Aug 22
- Chicago Triathlon Aug 22
- 370 Lakeside Triathlon Aug 23
- Sugar River Triathlon Aug 23
- Lake Country Half Marathon Aug 29
- Geist Waterfront Triathlon Aug 30
- Verona Area Kids Triathlon Aug 30
- Zionsville Sprint Triathlon Aug 30
September 2026
- Fontana Triathlon on Geneva Lake Sep 12
- IRONMAN 70.3 Wisconsin Sep 12
- Ironman Wisconsin (myTeam Triumph) Sep 13
- Ironman Wisconsin 2026 Sep 13
- Harvest Hammer Run and Duathlon 2026 Sep 19
- Carlyle Lake Triathlon Sep 20
- Ballwin Kids Triathlon Sep 27
- Have Fun? You Won! Kids Triathlon Sep 27
- Have Fun? You Won! Kids Triathlon Sep 27
- Tri The Illini Sep 27
October 2026
- Prairie State Cup Oct 3
- Mattoon Last Chance Tri Oct 4
- Tecumseh Trail Challenge Oct 17
November 2026
February 2027
- Wildcat Indoor Triathlon Feb 21