Named route: 'Sphairia Circuit' (Γύρος της Σφαιρίας). Start and finish at Heroes Square (Πλατεία Ηρώων). Electronic timing provided. Course runs alongside the sea and pine forest; mostly at sea level with one short hill on Sphairia (max 40m). All finishers receive a commemorative medal; top 3 in each age category receive medals plus a trophy for first place. Includes t-shirt, water, and banana. Co-organized with the Region of Attica.