 Originally called Trachis (Τραχίς), or by Strabo, Trachin (Τραχίν), the city was in the region of Malis, in the district called after, it Trachinia.It was located on a rocky plateau above the left bank of the Asopos River, at the point where it leaves Mount Oeta for the plain of Lamia.It stood in a little to the north or rather west of Thermopylae, thus commanding the approach to Thermopylae from Thessaly, and was, from its position, of great military importance.