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.
Dec 5 - Dec 62
Dec 12 - Dec 134
Dec 19 - Dec 203
Dec 26 - Dec 274
By the numbers
The Biggest Field
The largest field of any December 10K in Missouri, from the most recent published results.
Common Questions About Running a December 10K in Missouri
When in December are most 10K races held?
The busiest weekend in Missouri is December 12 and December 13, with 4 of them. One more falls on a weekday, which is worth knowing if you are traveling for it.