|Othrongroth is a concept which has only appeared in an adaptation of the works of J.R.R. Tolkien.|
Orthrongroth is a location created specifically for The Lord of the Rings Online: Shadows of Angmar. It was the oldest and largest Edain burial mound of the Barrow-downs. It might have been the burial mound of the Kings of Cardolan and/or the place where Frodo, Sam, Merry, and Pippin obtained the Daggers of Westernesse.