marathoner

noun

1. Someone who participates in a marathon or other long-distance races.

   “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.”

   ““I just go as long as I can before my legs get too heavy and my head gets in a haze,” said Chris Zablocki, the best marathoner most elite marathoners have never heard of.”