IAAF/AIMS certified course GRE2026-167. Route through Agion Anargyron valley past the Kri Kri ice cream factory, up to Neos Soulis, through Oinoussa and Agios Ioannis back to Serres. Highest point 162m at km 12.5, lowest 46m at start/finish. Aid stations: km 4 (water), km 6.8 (water + isotonic), km 10 (water), km 12 (water + gel + banana), km 16 (water + isotonic), km 18.5 (water + isotonic). Cash prizes for sub-1:20 men (1st €150, 2nd €100, 3rd €50) and sub-1:35 women (1st €150, 2nd €100, 3rd €50). Age group awards (top 3) for: 18-29, 30-39, 40-49, 50-59, 60-69, 70+ (top 3 overall excluded; minimum 5 finishers per category required). Maximum 300 participants. €1 per registration donated to ΚΕΘΙΣ (Equestrian Therapy Centre of Serres). Awards ceremony at 12:30. Bag storage available (no valuables). Age requirement: 18+ (born 2008 or earlier). Contact: marathonserres42@gmail.com, +30 6977259711.