When in March are most half marathons held?
The busiest weekend in Colorado is March 20 and March 21, with 4 of them, 2 of those on Saturday, March 20. Every one of them is on a Saturday or a Sunday.
Race calendar · March 2027 · Colorado
Half Marathons in Colorado in March 2027
Every Half Marathon in Colorado in March 2027, all 10 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
March Half Marathons, By the Numbers
2:08:38Median finish time
1:19:37Median winning time
84Median field size
5March half marathons 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
Half marathons 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 half marathons that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Colorado Half Marathons by City in March
All Half Marathons in Colorado in March
10 total Sat, Mar 6, 2027Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver Denver, COFrom $64Details Sun, Mar 7, 2027Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs Colorado Springs, COFrom $54Details Sat, Mar 13, 202722nd Annual Run Through Time Trail Marathon and Half Marathon Salida, COFrom $68Details Sun, Mar 14, 2027Lucky Brew Race 5K, 10K, 15k & Half Marathon Severance, COFrom $80Details Sat, Mar 20, 2027Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $45Register Sat, Mar 20, 2027St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $45Register Sun, Mar 21, 2027All-Out Spring Fever Golden, COFrom $70Details Sun, Mar 21, 2027Spring Equinox Wellington, COFrom $80Details Sat, Mar 27, 2027Always Hope Easter Run DENVER/AURORA Centennial, COFrom $45Register Sat, Mar 27, 2027SuperHeroes Run DENVER/AURORA Centennial, COFrom $45Register
Common Questions About Running a March Half Marathon in Colorado
What is a good Half Marathon time?
Across the 5 of these March half marathons with published results from past editions, the median finisher ran 2:08:38, and the median winning time was 1:19:37. So anything under 2:08:38 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 Half Marathon field?
The median one finished 84 runners, across the 5 of these March half marathons 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 3:28:26.