A marathon is 42.195 kilometers long, which is also equal to 26.2 miles. This distance has been the official standard for marathons worldwide since 1921, set by the International Association of Athletics Federations (IAAF).
A marathon is 42.195 kilometers long, which is also equal to 26.2 miles. This distance has been the official standard for marathons worldwide since 1921, set by the International Association of Athletics Federations (IAAF).