4500 Carbon Canyon Road in Brea.
Another entrance to Chino Hills State Park is in Brea adjacent to Carbon Canyon Regional Park on Carbon Canyon Road (Highway 142) at the Discovery Center. It is safest to park your vehicle at State Park or the Regional Park. Fees do apply in both lots. There is parking for equestrian trailers.
Download a map of the Carbon Canyon (Discovery Center) entrance. (PDF – 808KB)