The Downpatrick & County Down Railway are the only full sized Irish gauged heritage railway in Ireland. They run trains reguarly throughout the year to Inch Abbey & King Mangus Halt. Diesel Locomotives used vary, and include Ex Irish Rail bo-bo GM 146 , Co-Co A39, E421, G611, 613 & 617. 
Steam Locomotives include Ex Irish Sugar Beet company locos O&K 1 & 3, LPHC Loco Number 3 known as Harvey, GSWR Number 90. (Some of which are on loan to the DCDR)