The first train to leave Cavan departed for Dublin on 8th July 1856 and was open to passengers and goods transporters. Many people turned out to witness this historic occasion. In 1884 a branch line was added linking Killashandra to Crossdoney on the MGR line.
In 1860 the Dundalk and Enniskillen Railway Company built a branch line between Shantonagh in Co. Monaghan through Rockcorry to Cootehill. Then, in 1862 an extension line was built between Cavan town and Clones. In 1863 the railway between Clones and Monaghan town was completed and Cavan was integrated into the northern transport network. In the 1870s the Navan and Kingscourt Railway Company built a line from Kingscourt through Kilmainham Wood to Navan, while later in the 1870s the Sligo, Leitrim and Northern