Runners in all four races start at the entrance to San Pedro Valley County Park, which lies just south of Pacifica off Rosita Road. From there, the course takes runners in the half marathon along two main loops of trails that wind through the park, which include the Montara Mountain and Pedro Mountain trails. Runners in the half marathon will complete portions of these trails, along with the Gray White Cove Trail, before retracing their steps to the finish line.
(MORE: Pacifica Trail Run Half Marathon event details)