Mount Giona (, also transliterated as Gkiona, ]) is a mountain in Phocis, Central Greece. It is located between the mountains of Parnassus to the east, Vardousia to the west, and Oeta to the north. Known in classical antiquity as the Aselinon Oros (, 'moonless mountain'), it is the highest mountain south of Olympus and the fifth overall in Greece. Pyramida is its highest peak at . Other peaks include the Perdika (Πέρδικα, 2,484 m), Tragonoros (Τραγονόρος, 2,456 m), Platyvouna or Plativouna (Πλατυβούνα, 2,316 m), Profitis Ilias (Προφήτης Ηλίας, 2,298 m), Kastro (Κάστρο, 2,176 m), Vraila (Βράϊλα, 2,177 m), Paliovouni (Παλιοβούνι, 2,122 m), Pyrgos (Πύργος, 2,066 m), Lyritsa (Λυρίτσα, 2,007 m), Botsikas (Μπότσικας, 1,945 m), Kokkinari (Κοκκινάρι, 1,908 m), Tychioni (Τυχιούνι, 1,842) and another Profitis Ilias (Προφήτης Ηλίας, 1,806 m). It is drained by the river Mornos to the west.