"As far as there being a valid claim at mineral bar, I haven't ever seen a claim marker nor any signs indicating such." ".FWIW, if I don't see any indication of a claim, (signs/markers) I'm gonna feel free to do my thing, because maintaining a valid claim includes keeping the boundaries well marked. I know of nobody who encourages "mineral tresspass"..." In California it is not required to mark a claim's boudaries, even when they do get marked, many of them are taken down or destroyed (Very much against the law). By the second statement I have quoted in your response, it is you that is certainly encouraging mineral trespass. Is is clearly the responsibility of a prospector to research any area that is intended for prospecting PRIOR to doing the prospecting. You need to learn the law prior to spouting off about about doing something that is clearly illegal and not liked by valid claim owners.