4km from centre of Dublin in the Phoenix Park, signposted from the Phoenix Monument.
Bus 37, 38, 39 and 70 from Hawkins Street to the Halfway House Roundabout on Navan Road. Enter the park by the Ashtown Gate, walk approximately 190 metres to the T-junction and turn left, walk for about 10 mins until you reach the building on your left, the pathway on the right-hand side leads you towards the trees and the back gate of Ashtown Castle.
No. 46A from UCD Belfield to Phoenix Park - Infirmary Road - North Circular Road Gate (30 min walk from Gate).
Dublin Connolly to Ashtown Station.