The Athens International Ultramarathon Festival is a Multiday race which takes place at the former Ellinikon International Airport in Greece.
The first Athens International Ultramarathon Festival (UF) was organized by Dr Costas Baxevanis in 2005 in Loutraki, located approximately 80 km from Athens.
The first event was a 24hr race which took place in the Loutraki Stadium.
Edit Berces won that first race with 211 K. In 2005 the Ultramarathon Festival was supported by the Apollon Athletic Club, and thereafter for the next 3 events by the Athens Alpine Club.
In 2009, Dr Baxevanis founded the Association of Greek Dayrunners to act as the main and official organizing club for the Ultramarathon Festivals.