A forest car park in Ceredigion will be closed while Natural Resources Wales (NRW) carry out tree felling.
Some of the trees at The Arch, near Devils Bridge, have become infected with a fungus-like disease called Phytophthora ramorum, also commonly known as Larch disease.
To slow the spread of the disease, NRW will be felling the infected trees in the area.
The Arch car park and trail will be temporarily closed from Monday, 23 October, and the work is expected to take around 5 months to complete.
Steve Creswell, Mid-Wales Operations Manager for Natural Resources Wales, said:
“We look after many sites across Wales where people can enjoy the beauty of our natural environment.
“But sometimes we need to close parts of the forest to keep people safe during felling work.
“We know how much people value the area for leisure and relaxation and we will re-open the car park and the trail as soon as it is safe to do so.”
Signs will be put up in the area and NRW says it is vital that people follow these instructions for safety reasons.