St. Mary's Abbey is now a private residence.
No public access.
View location on Google Maps here
From Navan:
Head east on Kells Road towards Dublin. Turn right onto Circular Road. At the roundabout, take the 1st exit onto Railway Street. Continue onto R161 until you arrive in Trim. Turn left onto R154. At the roundabout, take the 3rd exit onto Castle Street. Destination will be on the right.
Via M1 Motorway or Drogheda:
Take the M1 (this road is tolled) coming from Belfast. At junction 10, take the N51 exit to Drogheda (North)/Navan/Collon. At the roundabout, take the 1st exit onto N51 for Slane. Continue on the N51 to Navan. Turn left onto Kells Road heading towards Dublin. Turn right onto Circular Road. At the roundabout, take the 1st exit onto Railway Street. Continue onto R161 until you arrive in Trim. Turn left onto R154. At the roundabout, take the 3rd exit onto Castle Street. Destination will be on the right.
From Dublin:
Take the M3 (this road is tolled) headed for Cavan. At junction 6, take the R125 exit to Dunshaughlin/Trim. At the roundabout, take the 1st exit onto R125. At the roundabout, take the 2nd exit ontoR125/R154. Continue to follow R154 until you reach Trim. At the roundabout, take the 2nd exit onto Castle Street. Destination will be on the right.