Marathon - Long-distance running event with an official distance of 42.195 kilometers
"The marathon is a long-distance race with an official distance of 42.195 kilometres, usually run as a road race. The event was instituted in commemoration of the fabled run of the Greek soldier Pheidippides, a messenger from the Battle of Marathon to Athens, who reported the victory. The marathon can be completed by running or with a run/walk strategy. There are also wheelchair divisions. - Wikipedia"