Illinois · September
September Races in Illinois
Find races in Illinois taking place in September. Compare dates, locations, distances and registration information. Explore 16 race with a confirmed dates.
- Upcoming, date confirmed
- 16
- Active listings
- 202
Nearby months
Browse Illinois races by distance
Races in nearby states
Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- Blog All guides Planning advice for finding, choosing and travelling to races.
September Races in Illinois: common questions
- How many races are there in Illinois in September?
- RaceRove currently lists 16 upcoming races in Illinois in September with a confirmed date, plus 186 annual events usually held that month whose next date hasn't been announced yet.
- What is the biggest race in Illinois in September?
- By estimated field size, the largest event is the Life Time Chicago Half Marathon & 5K, with about 10,000 runners across all of its distances.
Search every race in Illinois
Filter by month, distance, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.