I found a Find the Grave site locating Ard na Moran (in Irish, Ard na mBodhran) northeast of Ardrahan:
The site says that it is in a place called Mannin, but I could find no such place. To judge by the map link at that site, the location is somewhere near Rathcosgrove/Rathcosgry, which is on the R347 road about 4 miles northeast of Ardrahan. You can find Rathcosgrove on Google Maps, and if you search Rathcosgry on Google Earth, you can see the same area. I couldn't spot the graveyard itself on Google Earth, but I suppose if you get to the Rathcosgrove/Rathcosgry area, someone should be able to point the way.