The Olympic event that features 10 separate competitions over multiple days is the decathlon. This grueling track and field event is contested by male athletes, requiring a diverse set of skills across various disciplines, including sprints, jumps, and throws. It spans two days, demanding not only physical strength but also endurance and strategy. Athletes accumulate points based on their performance in each event, with the overall highest score determining the winner. The decathlon is a true test of an athlete's versatility, representing the pinnacle of athletic achievement in track and field.