A Merry Christmas Run 5K/10K/13.1 SAN DIEGO

A Merry Christmas Run 5K/10K/13.1 SAN DIEGO is run in San Diego, California, on December 26, 2026, with all four distances leaving at 7:30 a.m.: the half marathon (13.1 miles), the 10K, the 5K and a family one-mile fun run. The event leans on community and a festive atmosphere rather than on results, and timing is left to your own app if you want a number at the end. A race shirt, a finisher medal and a gift bag are included.

Because nothing here is chasing you, the half works nicely as a long run with support, which is what a January or February marathon build needs at this point in the calendar. Keep the effort conversational and you will be back to normal training within two days. First-timers at the distance should count backwards: twelve weeks, one long run a week, and no heroics in the final fortnight. The 5K remains the low-cost way to be part of the morning.