 It is located on the Alpheios river near Agios Ioannis, a few miles south-west of the modern village of Loutra Iraias, in the municipality of Gortynia in the western Peloponnese, Greece.The modern municipal unit of Iraia is named after it.Famous Olympic champions from Heraia include Demaretos (520 BCE), his son Theopompos (516 BCE), his grandson Theopompos and others.