The Barrow-Downs were green downs within which there were barrows
predating the arrival of the Dúnedain. In the year 1409, the remaining
Dúnedain of Cardolan took refuge in the Barrow-downs during the
wars with Angmar. Around 1636 of the Third Age, the Barrow-Downs
were inhabited by the Barrow-Wights. After this the Barrow-Downs
became a place of great terror. In Sindarin the Barrow-Downs were
called Tyrn Gorthad.