marathoner

marathon +‎ -er

• (UK) IPA^(key): /ˈmæ.ɹæ.θən.ə(ɹ)/

• Audio (US)

  (file)

marathoner (plural marathoners)

1. Someone who participates in a marathon or other long-distance races.
   • 2012 November 2, Ken Belson, New York Times, retrieved 2 November 2012:

     She called on all the marathoners to go to Staten Island to help with the clean-up effort and to bring the clothes they would have shed at the start to shelters or other places where displaced people were in need.

• half-marathoner