Coming June 29, 2014. Running with the gods. The Olympus Marathon is a 44km trail running race on Mt Olympus, in northern Greece. Yes, that Mt Olympus, the legendary home of the Greek Gods! Runners travel the sacred trail ancient Greeks followed to Olympus, the tallest mountain in Greece, where they ascended every year in order to honor and present sacrifices to Zeus. A challenging and unique race for experienced runners… without the sacrifice to Zeus.