When in March are most 5K races held?
The busiest weekend in Colorado is March 20 and March 21, with 5 of them, 3 of those on Sunday, March 21. Every one of them is on a Saturday or a Sunday.
Race calendar · March 2027 · Colorado
5K Races in Colorado in March 2027
Every 5K in Colorado in March 2027, all 11 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
35:45Median finish time
18:09Median winning time
284Median field size
7March 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 Field
The largest field of any March 5K in Colorado, from the most recent published results.
Colorado 5K Races by City in March
All 5K Runs in Colorado in March
11 total Sat, Mar 6, 2027Sharin' O' The Green 5k Fort Collins, COFrom $35Details Sat, Mar 6, 2027Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver Denver, COFrom $32Details Sun, Mar 7, 2027Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs Colorado Springs, COFrom $30Details Sun, Mar 14, 2027Lucky Brew Race 5K, 10K, 15k & Half Marathon Severance, COFrom $40Details Sat, Mar 20, 2027Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sat, Mar 20, 2027St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sun, Mar 21, 2027Central Park 5k Denver, COFrom $39Details Sun, Mar 21, 2027All-Out Spring Fever Golden, COFrom $40Details Sun, Mar 21, 2027Spring Equinox Wellington, COFrom $37Details Sat, Mar 27, 2027Always Hope Easter Run DENVER/AURORA Centennial, COFrom $30Register Sat, Mar 27, 2027SuperHeroes Run DENVER/AURORA Centennial, COFrom $30Register
Common Questions About Running a March 5K in Colorado
What is a good 5K time?
Across the 7 of these March 5K races with published results from past editions, the median finisher ran 35:45, and the median winning time was 18:09. So anything under 35:45 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 284 runners, across the 7 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 1:11:59.