Runners head onto the out-and-back loop course for the half marathon near the park entrance just off Bear Creek Road, and into the rolling grasslands and tree-shaded canyons of Briones Regional Park, which lies just south of Martinez. From there, the course takes those running the half marathon along a number of challenging uphill and downhill stretches, with some sections climbing nearly 900 feet over the course of a couple of miles during the race.
Note: The course map above provides the approximate route for the race. Though every effort has been made to ensure its accuracy, changes are sometimes made to race routes due to weather conditions, road closures or other circumstances that can require a course to be changed. If you see an error above, email us here.