March Madness USA

A half marathon is a road running event of 21,097.5 meters, or 13 ⁷/₆₄ miles, about 13.1 miles. It is half the distance of a marathon and usually run on roads. It is a popular race for relative amateurs, long enough to be a serious challenge but not requiring the level of training of a full marathon. In consequence, many towns and cities hold annual all-comers half marathon races through their streets. It is also common for a half marathon event to be held concurrently with a full marathon, using almost the same course with an early finish.

Marathan:

The marathon is a long-distance running event of 42.195 kilometres (26 miles 385 yards) that can be run either as a road race or off-road (for example, on mountain trails).