Wikipedia
Trachis
Trachis was a region in ancient Greece. Situated south of the river Spercheios, it was populated by the Malians.
Its main town was also called Trachis until 426 BC, when it became Heraclea Trachinia. It is located to the west of Thermopylae. Trachis is located just west of the westernmost tip of the island of Euboea, north of Delphi. Near this place archaeologists discovered tombs from the Mycenaean period.
According to Greek mythology Trachis was the home of Ceyx and Alcyone. Heracles went to Trachis after the death of Eunomus. The town is mentioned by Homer and for the last time in antiquity by Pausanias.