Hedden County Park -- which spans 420 acres across Dover, Mine Hill and Randolph -- will be closed through July 28, according to the Morris County Park Commission.
The "negative activities" were likely done by visitors thought to be from New York and Pennsylvania, who told police they were drawn to the park due to social media posts, Morris County park officials told NJ.com.
Visitors blocked water flow to make a swimming hole, burned trash in dumpsters, littered, drank alcohol, left the restrooms a mess and more, officials said.
Park officials hope the closure deters visitors, many of who were issued summonses, from coming back.
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