Post Office – Castlewellan, Annsborough – Opening Hours & Branch Details Post Office occupies an ideal space at 44 Ballylough Road, about a 1.06 mile distance north-east from the centre of Castlewellan (by Saint Pauls Church and Castlewellan Forest Park). The branch serves the customers of Castlewellan Town Centre, Castlewellan Peace Maze, Clarkill, Annsborough, Dundrinne, Ballylough, Magherasaul and Ballybannan. Today (Friday), branch hours begin at 9:00 am and end at 5:30 pm. Here, on this page, you’ll find other information about Post Office Castlewellan, Annsborough, including the opening hours, directions or phone info.