Recently I went to the top of Otay Mountain. While driving the gravel road I seen some trails that said "Non-Designated Route" on those State brown sticks. Does this mean I can NOT drive on them or that they are just not a designated trail? I know there is a CBP presence up there and didn't want to tread where I am not allowed. I figured I would ask one of them, but on my decent I never saw them again to ask. So does anyone here have the answer to my question?