Castlebar, Co.Mayo, is one of only two remaining intermediate stations still in use between Claremorris and Westport. The station buildings all show signs of their earlier Great Northern & Western Railway architecture, the GNWR were later taken over by the Midland Great Western. The MGWR built a typical signal cabin at the Claremorris end of the station on the down platform, which is now disused. Castlebar ceased to be a block post in the late 1980s, but a ballast siding located by the goods shed remained until the late 1990s, been controlled by a ground frame. Today, only the through line remains, leaving the station bereft of passing loop or sidings. The station buildings are well maintained on both the up, and disused down platforms.