New Year's Run 5K/10K/13.1 SAN FRANCISCO

New Year's Run 5K/10K/13.1 SAN FRANCISCO is held in San Francisco, California, on December 26, 2026. A half marathon (13.1 miles), a 10K, a 5K and a one-mile family fun run all begin at 7:30 a.m., open to runners and walkers of every level. Timing is optional, and a virtual entry lets you cover the distance wherever you are. Everyone who finishes gets a gift bag with a shirt and a finisher medal.

Levels are genuinely mixed here, so the field is not the reason to enter — the distance is. Treat the half as an end-of-year audit of your endurance: run the first six miles slower than feels right and see what is left at ten. Ten to twelve weeks with one long run each week is the standard on-ramp to a first 13.1. The virtual option is worth remembering if holiday travel makes the morning impossible.