Race calendar · December 2026
425 10K races across the US in December 2026, sorted by date. Which weekends are busiest, what the fields actually run, entry fees, and where each one starts.
December 10K racing in the US sits between the fall goal-race season and winter base-building, which means these events tend to attract a mix of runners chasing a year-end time and those running for the social side of the holidays. Festive branding is common, and many events bundle a 5K or half marathon alongside the 6.2.
The South and Southwest offer genuinely runnable conditions, while the Northeast and upper Midwest can serve up cold, wind, and unpredictable travel. Short daylight hours mean early start times are the norm almost everywhere in the country.
For a runner on a normal training schedule, December falls in a low-stakes window. That makes it a fine month for a tune-up effort or a festive social race without the pressure of a goal event, but it also means race-day preparation, especially warmup and layering, deserves more thought than a temperate-month start would.
What the field actually runs
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 16, 2026.
When in December
10K races are not spread evenly across December. 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 December 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
It is one of the busier months. December carries 425 10K races, against 687 in November, which is the fullest month of the year. There is a real choice of dates here, with less competition for entries than the peak of the season.
Plan for cold enough at the start that you will want gloves and a lightweight layer on top, then feel overdressed by mile three. A base layer, thin running jacket, and gloves handle most December mornings. In the South and Southwest, one layer less is usually enough. Dressing in easily removable pieces beats committing to a heavy jacket.
Both exist on the same calendar. Holiday-themed events with festive costumes and walking divisions run alongside flat, timed road races in warmer states where December conditions are close to ideal for fast running.
It can be, with one honest caveat: winter travel in the US is less predictable than fall travel. Races in southern coastal cities and the Sun Belt carry lower weather and travel risk than events in mountain or northern markets. If you are flying, build a day of buffer before race morning and check whether the event has a companion distance for family members.
A full summer of base miles followed by six to eight weeks of structured 10K work puts you at the start line in good shape. Runners coming off a fall half marathon or marathon can often transition with lighter sharpening work rather than a full build, since the base is already there.
The busiest weekend is December 12 and December 13, with 135 of them, 116 of those on Saturday, December 12. Another 23 fall on a weekday, which is worth knowing if you are traveling for one.
Across the 151 of these December 10K races with published results from past editions, the median finisher ran 1:03:45, and the median winning time was 43:30. So anything under 1:03:45 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.
The median one finished 17 runners, across the 151 of these December 10K 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 1:37:57.
Florida has 68, Texas has 58, California has 50, Georgia has 24, Washington has 19. If you are willing to travel, those are the states where a December weekend gives you the most to choose from.
Yes, 9 races around the United States get you off the pavement: 4 are trail races, and 5 mix road and trail.
