Torfaen County Borough Council has issued a warning to the public after one of its beauty spots was pictured full of cars on Monday afternoon.
The council said it had received a number of calls about busy car parks at beauty spots on the first day of the school half-term.
In a tweet on Monday, it said 86 cars were parked at the boating lake in Cwmbran alone on Monday.
Reminding people that "travel by car should be for essential journeys only", it added that enforcement officers would be patrolling car parks during half term to check people were complying with coronavirus travel guidelines.
"We've received calls today regarding busy car parks around the borough with 86 cars parked at the boating lake alone," the council said.
"We know it is really good for the body and mind to get some fresh air, but could we remind everyone that travel by car should be for essential journeys only.
"Exercise should start and finish from home with one other person. Enforcement officers will be patrolling car parks during half term to check travel regulations are not being broken. Although we can't barrier them off, skate parks have been closed to follow Welsh Government rules."
A number of councils have been taking measures to stop people from driving to Welsh beauty spots during the current lockdown.
In January, Newport council shut the car park of the Fourteen Locks Canal and Visitor Centre in Rogerstone following an influx of people travelling there "without reasonable excuse."
Last week it was revealed that less than half of all fines issued by Gwent Police for Covid-19 rule breaches had been paid.
444 fines have been issued in the Gwent Police force area for reasons such as meeting households or holding gatherings outside of the guidelines, a lack of wearing face coverings in public spaces and entering or leaving Wales without a reasonable excuse.
However, only 174 have been paid. Read the full story here.