Race calendar · September 2026 · Illinois

September 2026 10K Races in Illinois

Every 10K in Illinois in September 2026, all 7 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.

7 10K races in September 2026

5K in SeptemberHalf Marathon in SeptemberMarathon in September

By the numbers

The Biggest and Longest-Running

The September 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.

Largest field376 finishersDeKalb Corn Classicin the 5K

September 10K Races by City

Chicago 2Elk Grove Village 2DeKalb 1Edwardsville 1Plainfield 1
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Soonest 10K Races in September

7 total
Sat, Sep 26, 2026SIUE Cougars Unleashed Homecoming Run Edwardsville, IL10K5K1 MileFrom $20Details Sat, Sep 26, 2026Oktoberfest Run 5K/10K/13.1 CHICAGO/EVANSTON Chicago, IL5K10KHalf Marathon1 MileRegistration closedFrom $30View race Sat, Sep 26, 2026Run for Donuts 5K/10K/13.1 CHICAGO/EVANSTON Chicago, IL5K10KHalf Marathon1 MileRegistration closedFrom $30View race Sun, Sep 27, 2026Plainfield Harvest Run 5k/10k & Kids Miler Plainfield, IL1 Mile5K10KFrom $20Details Sun, Sep 27, 2026DeKalb Corn Classic DeKalb, IL10K5KFrom $35Details Sun, Sep 27, 2026Northwest CASA Pumpkin Dash 5k / 10k Elk Grove Village, IL5K10KFrom $15Details Sun, Sep 27, 2026Golden Harvest Half Marathon & 5k/10k - Greater Chicago Elk Grove Village, IL50m1 Mile5K10KFrom $22Details

Common Questions About Running a September 10K in Illinois

When in September are most 10K races held?

The busiest weekend in Illinois is September 26 and September 27, with 7 10K races on those two days, and the single busiest day is Sunday, September 27 with 4. Every one of them is on a Saturday or a Sunday.

When should I sign up for a September 10K?

As early as you can. 2 of these September 10K races already have a price increase on the calendar, and 5 are open for entry right now. Another 2 have published an opening date and have not opened yet.

How much does a September 10K cost to enter?

The typical entry is $22, with paid entries running from $15 up to $35. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.

10K Races in Other Months

August and October sit either side of September, which is where most people look next when a date does not fit.

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