When in April are most 10K races held?
The busiest weekend in Illinois is April 10 and April 11, with 4 of them, 3 of those on Saturday, April 10. Every one of them is on a Saturday or a Sunday.
Race calendar · April 2027 · Illinois
10K Races in Illinois in April 2027
Every 10K in Illinois in April 2027, all 9 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
April 10K Races, By the Numbers
1:02:54Median finish time
39:52Median winning time
43Median field size
3April 10K races with published results
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Nov 12, 2026.
When in April
The April Race Weekends
10K races are not spread evenly across April. Here is how the calendar actually falls, weekend by weekend, which is the part worth knowing before you book a trip or plan a taper around one.
By the numbers
The Biggest and Longest-Running
The April 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Illinois 10K Races by City in April
All 10K Runs in Illinois in April
9 total Sat, Apr 3, 2027Chi Town Half Marathon & 10K Chicago, ILFrom $50Details Sat, Apr 3, 2027DoNot Stop Half Marathon/5K/10K - Greater Chicago Wheaton, ILFrom $38Details Sat, Apr 10, 2027Southern Illinois 10K, Micro-Marathon, and PeeWee Marathon Marion, ILFrom $30Details Sat, Apr 10, 2027Sloth Run 5K/10K/13.1 CHICAGO/EVANSTON Chicago, ILFrom $42Register Sat, Apr 10, 2027Run for PB&J 5k/10k/13.1 CHICAGO/EVANSTON Chicago, ILFrom $42Register Sun, Apr 11, 20272nd Annual Duke's Alehouse Spirits Run 5k/10k Crystal Lake, ILFrom $50Details Sat, Apr 17, 2027Galena Kiwanis River Trail Run Galena, ILRegistration opens Nov 16From $35Details Sat, Apr 24, 2027Coffee Lovers Run CHICAGO/EVANSTON Chicago, ILFrom $42Register Sat, Apr 24, 2027Run for Donuts CHICAGO/EVANSTON Chicago, ILFrom $42Register
Common Questions About Running an April 10K in Illinois
What is a good 10K time?
Across the 3 of these April 10K races with published results from past editions, the median finisher ran 1:02:54, and the median winning time was 39:52. So anything under 1:02:54 puts you in the faster half of a typical field. That is the middle of these RunSignup fields, walkers and charity entrants included, not a national average.
How big is a typical April 10K field?
The median one finished 43 runners, across the 3 of these April 10K races with published results from past editions. Most are far smaller than the big-city events people picture, which means less crowding at the start and a friendlier field, with a last recorded finisher at 1:35:34.