How long is a half marathon?
The half marathon is a road race distance of exactly 21.0975 km,
as defined by the International Association of Athletics Federation
(IAAF), the Association of International Marathons and Distance
Races (AIMS), and the Road Running Technical Council of USA Track
& Field (RRTC/USATF). The conversion of this distance into
Imperial units is approximately -- not exactly -- 13.10938
Half marathons such as The Disney Princess Half Marathon is a
popular marathon that takes place in Orlando, Florida.