Downpatrick, Killough and Ardglass Railway

It was in effect a subsidiary of the Belfast and County Down Railway who were to build and operate it.

The Belfast and County Down Railway decided that it would be built to Irish standard gauge to avoid the trans-shipment of all traffic at Downpatrick.

The cost of construction was over £60,000 (equivalent to £8,240,000 in 2023) [2] and freight services to Ardglass started on 25 May 1892.

The 8.05 miles (12.96 km) line was funded by indirect government subsidy to help the herring fishing industry.

The line found itself under the control of the Ulster Transport Authority and was closed on 16 January 1950.

The old railway embankment across the head of Killough Harbour
Remains of Ardglass railway station