The phrase "are often overrun with" is correct and usable in written English.
It can be used to describe a situation where something is frequently overwhelmed or filled beyond capacity, often with unwanted elements.
Example: "The local parks are often overrun with tourists during the summer months."
Alternatives: "are frequently inundated with" or "are commonly filled with".
By August, Mr. Klopp was promising himself that he would never rent a summer house again, because the already full house was often overrun with people who had not paid for a share, he said.
Though the area is often overrun with tourists, you can escape most of the crowds by taking a five-minute walk uphill to Weingut am Reisenberg, Oberer Reisenbergweg 15, (43-1) 320-9393, where the wine is merely adequate but the view over the city is panoramic.
A verbose strip whose Sundays were often overrun with prose, its lead characters were Uriah and Ida Stumble, who rented rooms to an assortment of strange characters.
Given that the High Line is often overrun with picture-taking people, Queensway could become an alternate charming date spot, invigorating the surrounding neighborhoods economically and energetically.
San Gimignano, for instance, is often overrun with visitors, but from the ancient tracks of the I Torri waymarked trail, which starts at Porta San Giovanni, the views back to the medieval towers are sublime.
Mr. Newsom, who said he suspected that the rifle association might also sue to overturn a local ordinance requiring trigger-locks, challenged N.R.A. officials to come to his city and spend time in public housing developments, which he said were often overrun with weapons.
In consequence, cost and time overruns are often the direct outcome of mismanagement of changes.
WIS in Columbia said it limited political commercials so that breaks were not overrun with messages that were often scathing and unpleasant.
The city's beaches are now overrun with the pellets.
College movies are routinely overrun with the receptacle.
