In general, nearly all federal and state lands are off limits - except if you are given special permission or issued a permit. In some states, many counties also strictly prohibitmetal detecting in all of their publicparks. ... Metal detecting is OK in most parks (not all) but you cannot remove anything from the parks. SmarterHobby.com
Yes
This is a county park. I have used my metal detector there. Never had a problem. Call Harris County Precinct 4 and ask if you want to be extra thorough.
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