The half marathon record is 57:31 for 21.1km, so it’s not too far off. https://en.m.wikipedia.org/wiki/Half_marathon_world_record_progression https://en.m.wiki

The half marathon record is 57:31 for 21.1km, so it’s not too far off. https://en.m.wikipedia.org/wiki/Half_marathon_world_record_progression https://en.m.wikipedia.org/wiki/Half_marathon_world_record_p...