TSEC Marathon 2026 – Run for Health, Fitness, and Camaraderie! Our annual flagship event, TSEC Marathon, is the highlight of the year! The aim of this event is to promote sportsmanship, encourage participation in physical activities, and foster a spirit of healthy competition among participants. Every year, TSEC Marathon draws runners of all levels – from enthusiastic beginners to seasoned athletes – and celebrates participation with unwavering enthusiasm, teamwork, and camaraderie.