Introduction

This line ran west from Dundalk Barrack Street, crossing the Dublin and Belfast Junction Railway on the level (with which there was a connection), cross country to Enniskillen [DandER].

There were branches:
Cootehill Branch (Dundalk and Enniskillen Railway) (1860)
Cavan Branch (Dundalk and Enniskillen Railway) (1862)
and a lease of the
Londonderry and Enniskillen Railwaywhich in 1862 led to the company being renamed the Irish North Western Railway.
Another branch was opened
Carrickmacross Branch (Irish North Western Railway) (1866)

With the closure of Dundalk Barrack Street's goods yard in 1995 the only remaining part of the line today is a short curve from south of Dundalk station to the south west, sidings on the curve brought into use to replace the closed goods yard.