Liddesdale, the valley of the Liddel Water, in the County of Roxburgh, southern Scotland, extends in a south-westerly direction from the vicinity of Peel Fell to the River Esk, a distance of 21 miles (34 km). The Waverley route of the North British Railway ran down the dale, and the Catrail, or Picts' Dyke, crosses its head.

Roxburghshire or the County of Roxburgh is a historic county and registration county in the Southern Uplands of Scotland. It borders Dumfriesshire to the west, Selkirkshire and Midlothian to the northwest, and Berwickshire to the north. To the southwest it borders Cumberland and to the southeast Northumberland, both in England.