Trail run on Mt. Kallidromo. Start at Iera Moni Damastas (630m altitude), finish at Thermopylae Museum. 80% trails, 20% forest roads, maximum elevation 1060m. 4 aid stations at km 2.3, 5.2, 9.3, and 12.5. Free shuttle buses from Thermopylae Museum to start (09:30–10:00 on race day). BIB pickup at Thermopylae Museum on race day from 07:00–09:30 (valid ID required). Age categories: M18–39, M40+, W18–39, W40+ (minimum 6 finishers per category). No plastic cups at aid stations — bring your own vessel (minimum 0.5L). Contact: info@trahina.gr, tel. 6930071791.