By car
From Dublin, take the M1 towards Drogheda. From the west take the N52 via Navan/Slane. On both routes follow the brown/white signage for the Visitor Centre and not for Newgrange Farm. The Visitor Centre is located west of the village of Donore, Co. Meath, Ireland. This tends to cause some confusion among visitors, as the Brú na Bóinne Visitor Centre is located on the south side of the river Boyne, whereas the sites themselves are located on the north side of the river.
By bus
From Dublin, take the No.100X bus to Drogheda from Busáras bus station (http://194.106.151.88/jpl...), from Belfast take the BE service from the Europa Buscentre to Drogheda. From Drogheda take the the No.163 bus from the bus station to the Visitor Centre in Donore (http://194.106.151.88/jpl...)?.
All access to the Newgrange and Knowth sites is by guided tour only and all tours begin at the Visitor Centre. Anyone arriving directly at the sites will be redirected to the Brú na Bóinne Visitor Centre, where they are placed on the next available tour. Visitors cross the river via a footbridge at the Visitor Centre and are brought by shuttle bus to the sites. Due to the small nature of the interior of the sites, places are limited to max 700 per day, which can fill up quickly - particularly during summer months. Tours are sold on a first come, first serve basis and so visitors are advised to arrive early.
Tour Operators
Bus Ãireann (https://www.buseireann.ie...), Mary Gibbons highly recommended (http://www.newgrangetours.com/) and Irish City Tours (http://www.irishcitytours...) operate regular tours from Dublin to the Visitor Centre and Newgrange site most days.