This runs him afoul of the Guinness Book of World Records, whose officials balk at recognizing any but officially sanctioned events, but Dunn insists he runs the accredited marathon course under supervision of whatever race officials he can persuade to accompany him. Since marathon courses are public thoroughfares the day before the event, Dunn frequently finds himself out on the roads at 4 o'clock in the morning. At that hour, his only accompaniment is owls, safecrackers and duck hunters. Plus his own clocker, often following by motorcycle.
He runs 4-hour marathons, hardly gold-medal stuff. But, then, nobody got a clock on Pheidippides, either.