The longest race in track and field is the marathon, which is traditionally set at a distance of 26.2 miles (42.195 kilometers). This race tests not only the physical endurance of the participants but also their mental resilience. Athletes train extensively to prepare for the marathon, focusing on long-distance running techniques and strategy. Historically significant, the marathon has its roots in the ancient Greek legend of Pheidippides, symbolizing perseverance and achievement in the sport.