When in September are most half marathons held?
The busiest weekend in Oklahoma is September 18 and September 19, with 5 of them, 4 of those on Saturday, September 18. Every one of them is on a Saturday or a Sunday.
Race calendar · September 2027 · Oklahoma
Half Marathons in Oklahoma in September 2027
Every Half Marathon in Oklahoma in September 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
September Half Marathons, By the Numbers
2:12:24Median finish time
1:30:15Median winning time
31Median field size
8September 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 Oct 23, 2026.
When in September
The September Race Weekends
Half marathons are not spread evenly across September. 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 September Half Marathon in Oklahoma, from the most recent published results.
Oklahoma Half Marathons by City in September
All Half Marathons in Oklahoma in September
9 total Sat, Sep 4, 2027Medal Madness 5K, 10K, 13.1M & 26.2M Stillwater, OKFrom $65Details Sat, Sep 11, 2027Golden Harvest Half Marathon & 5K/10K - Tulsa Tulsa, OKFrom $55Details Sat, Sep 11, 2027Heroes and Villains Half Marathon- Oklahoma City Oklahoma City, OKFrom $49Details Sun, Sep 12, 2027Heroes and Villains Half Marathon- Tulsa Tulsa, OKFrom $49Details Sat, Sep 18, 2027Oklahoma Fallen Heroes Oklahoma City, OKRegistration opens Feb 28, 2027From $70Details Sat, Sep 18, 2027Golden Harvest Half Marathon & 5k/10k - Oklahoma City Oklahoma City, OKFrom $48Details Sat, Sep 18, 2027Talk Pirate to Me 5K/10K/Half - Oklahoma City Oklahoma City, OKRegistration opens Jul 7, 2027From $60Details Sat, Sep 18, 2027Ninja 5K, 10K, & 13.1M at Stillwater, OK (38) Stillwater, OKFrom $65Register Sun, Sep 19, 2027Bound for Boston Marathon & Half Marathon Yukon, OKRegistration opens Dec 1From $45Details
Common Questions About Running a September Half Marathon in Oklahoma
What is a good Half Marathon time?
Across the 8 of these September half marathons with published results from past editions, the median finisher ran 2:12:24, and the median winning time was 1:30:15. So anything under 2:12:24 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 September Half Marathon field?
The median one finished 31 runners, across the 8 of these September 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 3:18:16.