Dundee's Templeton Woods will remain off-limits into 2022 while council workers continue to deal with the aftermath of Storm Arwen.
Hundreds of trees across the city were brought down by the storm on November 26, affecting the city's residential areas, schools and parks.
Templeton Woods in the north-west was among the worst-hit areas.
The park, which is popular with dog walkers, has been cordoned off since the storm hit.
Local authorities are yet to say when the park will re-open as clean-up efforts continue into the new year - but have pleaded with people to stay away as they are "taking their life into their hands" if they breach the cordon.
Councillor Anne Rendall, the city council's neighbourhood services convener, says the damage is "worse than anything" in recent history and has asked for residents to be patient.
She said: "The scale of the damage to our city’s trees by Storm Arwen has been unprecedented.
"There will still be a large amount of work required in order to clear areas of the city, including to Templeton Woods and parts of Balgay Park, Camperdown Park and the Green Circular.
"It’s important that this is carried out safely and therefore could take some time to be completed.
"The council’s staff are working hard to get our outdoor areas cleared and we must be patient to allow them to do this."
Clean-up works in Dundee's parks are scheduled to begin after the festive period comes to an end.
The effort will see uprooted trees and fallen branches removed from the pathways in Templeton Woods.
Dundee's Ranger Service has echoed Cllr Rendall's pleas for locals to avoid the woodland until it is made safe.
In an announcement made last week, the service said: "Templeton Woods is closed to the public until the site has been assessed and cleared of dangerous timber.
"Even the parts that may look safe at first sight often have very heavy branches hanging above the paths.
"If one of these falls upon you there will also be no possible access for emergency services.
"We can't stress enough that you are taking your life into your hands by continuing activities like jogging, cycling and dog walking there. Do not enter."
Residents are being asked to follow the warning signs in place at Dundee's parks, and to refrain from climbing on fallen trees.
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