Thanks for reporting! This trail is maintained by the Bay Area Ridge Trail Council (www.ridgetrail.org). You can submit this report to them online or by calling them directly. I would suggest reporting this directly to them so you can provide a more detailed description of where along the trail you found the markings. Their contact information is here http://www.ridgetrail.org/index.php/contact-us. Thanks again for using SeeClickFix!