Chino Hills Trail Run Series Fall

Join us for the Chino Hills Trail Run Series Fall, celebrating its 10th year and supporting the Chino Hills State Park Discovery Center. Whether you're new to trail running or a seasoned pro, this event offers a range of distances from a 10k race to a challenging 50K ultramarathon, allowing you to explore the beauty of Orange County's natural open-space parks. With well-marked courses, ample aid stations, and stunning trails, this series provides the perfect opportunity to test your trail legs and immerse yourself in the wilderness. Mark your calendars for November 15, 2025, and experience the thrill of trail running in one of California's most picturesque settings.