When in March are most 5K races held?
The busiest weekend in Illinois is March 13 and March 14, with 9 of them, 8 of those on Saturday, March 13. Every one of them is on a Saturday or a Sunday.
Race calendar · March 2027 · Illinois
5K Races in Illinois in March 2027
Every 5K in Illinois in March 2027, all 20 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
March 5K Races, By the Numbers
36:47Median finish time
17:36Median winning time
151Median field size
5March 5K 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 March
The March Race Weekends
5K races are not spread evenly across March. 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 March 5K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Illinois 5K Races by City in March
All 5K Runs in Illinois in March
20 total Sat, Mar 6, 2027Miller Park Zoo Stampede Bloomington, ILRegistration opens Dec 1From $35Details Sat, Mar 6, 2027Manhattan Irish Fest Parade 5k Manhattan, ILRegistration opens Nov 27From $30Details Sat, Mar 6, 2027Go For The Green St. Patrick’s Race Utica, ILFrom $35Details Sat, Mar 6, 2027Eckert's Belleville Farm Miles for Mimosa 5k Belleville, ILFrom $30Details Sat, Mar 6, 2027Frozen Banana Spirits Run 5k/10k South Elgin, ILFrom $35Details Sat, Mar 13, 2027Shamrock Beer Run & BrewFest Chicago at Busse Woods Rolling Meadows, ILFrom $30Details Sat, Mar 13, 2027McHenry Kiwanis Club Shamrock Shuffle 5K Mchenry, ILFrom $35Details Sat, Mar 13, 2027Shamrock Beer Run - Rockford Rockford, ILFrom $30Details Sat, Mar 13, 2027Welcome to the 11th Annual SOB Run Yorkville, ILFrom $40Details Sat, Mar 13, 2027Lucky Dog 5K - Schaumburg Rolling Meadows, ILRegistration closedFrom $25Details Sat, Mar 13, 2027Castle Ridge Shamrock Shuffle 5K Centralia, ILFrom $30Details Sat, Mar 13, 2027Shorewood Shuffle Shorewood, ILFrom $35Details Sat, Mar 13, 2027Lucky Dog 5K Champaign, ILRegistration opens Dec 1From $20Details Sun, Mar 14, 2027Deer Park St. Paddy's 5K & 10K Run/Walk Deer Park, ILFrom $37Details Sat, Mar 20, 2027Kennekuk Road Runners - Mountain Goat Oakwood, ILFrom $30Details Sat, Mar 20, 2027Lori's Walleye Run 5K Spring Valley, ILFrom $25Details Sat, Mar 20, 2027Sunrise Marathon 5K/10K/13.1 CHICAGO/EVANSTON Chicago, ILFrom $30Register Sat, Mar 20, 2027St. Paddy's Day Lucky Run 5K/10K/13.1 CHICAGO/EVANSTON Chicago, ILFrom $30Register Sat, Mar 27, 2027Always Hope Easter Run CHICAGO/EVANSTON Chicago, ILFrom $30Register Sat, Mar 27, 2027SuperHeroes Run CHICAGO/EVANSTON Chicago, ILFrom $30Register
Common Questions About Running a March 5K in Illinois
What is a good 5K time?
Across the 5 of these March 5K races with published results from past editions, the median finisher ran 36:47, and the median winning time was 17:36. So anything under 36:47 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 March 5K field?
The median one finished 151 runners, across the 5 of these March 5K 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 1:01:56.