MAIN ROUTE: 98-hour ultra marathon retracing Phidippides' historic 490 BC run from Athens Ancient Agora to Sparta and back. Route passes through: Eleusina, Megara, Ancient Corinth, Ancient Nemea, Artemisio mountain (1,227m), and Sparta's Leonidas statue. See also: 10th Authentic Phidippides Run 2026 - Athens - Sparta - Athens - Marathon 524.9km (optional extension). NO COMPETITIVE PREREQUISITES - anyone can participate regardless of prior experience. Medical certificate (not older than 6 months) required at race pickup. Registration deadline: 30 September 2026. Entry fee: €300 (until 28/02/2026) or €350 (from 01/03/2026, for those permanently residing in Greece with 50% discount). FINISHER REWARDS: Medal, diploma, commemorative t-shirt, and finisher gift. COURSE SUPPORT: 77 feeding stations total; 11 main aid stations with hot food (vegetarian/non-vegetarian options), rest facilities, and personal supply depots. Electronic chip timing with GPS tracking device (SOS button) provided to all runners. SAFETY REQUIREMENTS: Reflective clothing/vest, functional headlamp, and red rear light mandatory from dusk to dawn. Waterproof jacket required. Support vehicles allowed only at official feeding stations (30m rule) - unauthorized assistance results in disqualification. MEDICAL: Full coverage throughout course (doctors, paramedics, EKAB). Multiple hospitals on alert. No hotel accommodation permitted during race. No performance-enhancing drugs allowed. Committed to environmental sustainability as a 'green race.' Memorial edition (10th anniversary) dedicated to Taki Skuli, race creator.