The marathon at the Summer Olympics is the only road running event held at the multi-sport event. The men's marathon has been present on the Olympic athletics programme since the first modern Olympics in 1896. Nearly ninety years later, the women's event was added to the programme at the 1984 Olympics in Los Angeles.

Spyridon Louis, commonly known as Spyros Louis, was a Greek water carrier who won the first modern-day Olympic marathon at the 1896 Summer Olympics. Following his victory, he was celebrated as a national hero.