The most people running 100 meters in a 12 hour relay is 2,400 at an event organised by Al-Jazeera Club and IF Charity (both Palestine) at Al-Yarmook Field in Gaza, Palestine, on 23 October 2010.
Participants of all ages took part in the event, which was called Gaza100 and ran from 8 a.m. until 8 p.m.