Upcoming Duathlons in Illinois

Endurance Grid lists 3 duathlons in Illinois, from September 2026 to July 2027 across 2 cities.

3
Races
2
Cities

The lay of the land

Duathlon Races in Illinois

The duathlon race calendar in Illinois is busiest in July, September, and October, with races most often in Rockford.

What a duathlon is

A duathlon is a triathlon without the swim: you run, transition to the bike, ride, then transition back and finish on foot. Two disciplines, two timed transitions, no open water — which makes it one of the most accessible ways into multisport racing.

Most US duathlons run one of two distances. A sprint is roughly a 5K run, 20K bike, and 2.5K run — short enough to finish on a first attempt. The standard, often called Olympic, doubles the front end to a 10K run, 40K bike, and 5K run. Exact distances vary by organizer.

Frequently Asked Questions (FAQs)

How many duathlons are in Illinois?+
Endurance Grid's Race Calendar lists 3 upcoming duathlons in Illinois across 2 cities, from September 2026 to July 2027.
What duathlon distances are offered in Illinois?+
Duathlons in Illinois include Olympic and Sprint distances.
When is duathlon season in Illinois?+
Duathlon season in Illinois runs spring through fall. Of the upcoming duathlons on Endurance Grid's Race Calendar, the most are in July and September.
Which Illinois cities have duathlons?+
Duathlons in Illinois are held in Rockford and Carlyle Township.

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