Dundurn is the site of a Pictish hillfort in what is now Strathearn in Scotland.
The fort was situated on a hill with the River Earn to one side and the Allt Ghoinean burn to another. Excavations have identified three stages of fortification between 500 and 800 AD.
The fort at Dundurn (or Dún Duirn) is mentioned twice in the Annals of Ulster, firstly relating to a siege in 683 AD, at which time it was held by King Bridei III, and secondly as the location of the death of a king in 889 AD.
References
Dundurn, Scotland Wikipedia(Text) CC BY-SA