"The Maid on the Mourne Shore", in Gaelic "An Traigh Múghdhorna", also known as "The Moorlough Shore", "Banks of the Moorlough Shore" or "The Maids Of The Mountain Shore" is an Irish lyric song. There have been many transcriptions made of this melody in various keys (mostly Bb minor or E minor).
Some transcribers find similarities between this air and the one to which Yeats' poem 'Down by the Sally Gardens' is generally set though lately it has been more often set to the air known as "The Sally Gardens (air)". There are also some similarities to the melody usually used for "The Star of County Down" which is a member of the "Dives and Lazarus" family.
While there is no Mourne Shore in Northern Ireland there is a Mourne River (Irish: An Mughdhorn) in County Tyrone, Northern Ireland (between Strabane and Newtownstewart), that is a tributary of the River Foyle. There are also the Morne Mountains, south of Belfast near the coast (the subject of "The Mountains of Mourne" by Percy French).
The melody is also used for a version usually also called "The Foggy Dew" about the Easter Week Rising of 1916.
It is #2742 in the Roud Index.