When in March are most 5K races held?
The busiest weekend in Illinois is March 13 and March 14, with 5 5K races on those two days, and the single busiest day is Saturday, March 13 with 4. Every one of them is on a Saturday or a Sunday.
Race calendar · March 2027 · Illinois
March 2027 5K Races in Illinois
Every 5K in Illinois in March 2027, all 12 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
12 5K races in March 2027
What the field actually runs
March 5K Races, By the Numbers
42:22Median finish time
19:34Median winning time
257Median field size
3March 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 Sep 22, 2026.
When in March
The March Race Weekends
5K races do not spread evenly across March. The busiest weekend is March 13 and March 14, with 5 of them.
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.
March 5K Races by City
Soonest 5K Races in March
12 total 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 13, 2027Shamrock Beer Run & BrewFest Chicago at Busse Woods Rolling Meadows, 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 opens Nov 10From $25Details Sat, Mar 13, 2027Shorewood Shuffle Shorewood, ILRegistration opens Oct 1From $35Details Sun, Mar 14, 2027Deer Park St. Paddy's 5K & 10K Run/Walk Deer Park, ILFrom $13Details 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
When should I sign up for a March 5K?
As early as you can. 6 of these March 5K races already have a price increase on the calendar, and 9 are open for entry right now. Another 3 have published an opening date and have not opened yet.
How much does a March 5K cost to enter?
The typical entry is $30, with paid entries running from $12.99 up to $40. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
What is a good 5K time?
Across the 3 of these March 5K races with published results from past editions, the median finisher ran 42:22, and the median winning time was 19:34. So anything under 42:22 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 257 runners, across the 3 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 1:25:12.
5K Races in Other Months
February and April sit either side of March, which is where most people look next when a date does not fit.