Niagara Parks Police say they issued 31 provincial offence notices and issued scores of warnings this weekend to people disobeying posted signage in the Niagara Glen.
They're continuing to advise the public to stay on the marked trails.
On Friday, the City of St. Catharines closed Morningstar Mill indefinitely.
The site and its access to Decew Falls and the Bruce Trail have drawn large crowds the last month as well as a number of emergency rescue calls.
Illegal parking was also a problem.
There's no word yet, if the Parks Police will restrict access to the Gorge.