RUN Colusa

RUN Colusa is held in Colusa, California, on November 8, 2026. Three road distances start together at 8 a.m.: a 5K, a 10K and a half marathon (13.1 miles). A single start time and a small set of formats make for an uncomplicated morning, and one that suits a group entering different races together.

The half is the distance most people will train for specifically. Twelve weeks of consistent running, one long run a week climbing toward 11 miles and a weekly stretch at goal effort is the reliable formula, whether the target is a first finish or a faster one. If your season is already long, the 10K is the better use of a November date: it needs less taper, leaves you recovered within days, and gives an honest read on your current fitness heading into winter. Newer runners will find the 5K an approachable place to start.