Post Office – Castlewellan, Drumaroad – Opening Hours & Branch Details Post Office is easy to get to at 13A Chapel Lane, a 4.81 mile drive north of the centre of Castlewellan. The branch is located in a convenient locale that chiefly serves the people of Downpatrick, Drumanaghan, Scrib, Banbridge, Drumaroad, Claragh, Drumanaquoile and Dunturk. Today (Friday), it’s open from 9:00 am – 4:00 pm. On this page, you’ll find hours of business, navigation, telephone number and other information about Post Office Castlewellan, Drumaroad.