Historic half marathon certified by AIMS, part of the World Athletics calendar, held 4 weeks before the Athens Authentic Marathon as its ideal simulation race. Route connects the Thermopylae battlefield with the historic Gorgopotamos Bridge. Minimum age 18 (16+ with parental consent). Age categories: Men/Women Overall, U39, 40-49, 50-59, 60+ (minimum 6 starters required per category, otherwise merged with adjacent category). Overall top-3 finishers are excluded from age-category awards (no double awards). 6 aid stations along the course. Littering outside aid stations results in disqualification. Includes BIB, aid stations, medical support, timing, gift, and finisher medal. Protests must be filed within 30 minutes of finish. Secretariat opens 08:00 at Gorgopotamos; shuttle buses to the start depart at 09:15; awards ceremony at 12:30 at Gorgopotamos; finish line closes at 13:00 (3-hour cutoff).