as hedger said saint endas park.
if you take the tallaght exit off the m50, take left towards city centre/templeogue, take third exit at next roundabout (right) at end of this road take a left, go through next set of traffic lights at crossroads take a right (blue haven pub in front of you). at very end of this road you
come to traffic lights, take a right here at next roundabout take a left go past the statoil and then at the next set of traffic lights take a left and follow this road until you come to the first right take that right then entrance to park 150 metres on right hand side.