The Boyne Navigation (Irish: Loingseoireacht na Bóinne) is a series of canals running 31 km (19 mi) roughly parallel to the River Boyne from Oldbridge to Navan in County Meath, in Ireland. The navigation was once used by horse-drawn boats travelling between Navan, Slane and the port of Drogheda; however is now derelict. The Boyne Navigation branch of the Inland Waterways Association of Ireland have an agreement with An Taisce – The National Trust for Ireland giving it a license to carry out restoration work on the navigation to return it to a usable waterway.