noun
half-marathon
A road race of 21.0975 km, exactly half the distance of a full marathon.
来月、初めてハーフマラソンに出場します。
Next month I will run a half-marathon for the first time.
ハーフマラソンのコースは川沿いの道です。
The half-marathon course is a path along the river.
Loanword from English 'half-marathon'.