I have friends who run marathons. Seems a bit daft to me, though I do quite like the idea of walking one. But I learned from friends who had recently done the London one that there's also a recent tradition of the Reverse London Marathon, which starts at midnight and follows the course in reverse, arriving at the start a little while before all the other competitors set off.

Some sites refer to this as the Nohtaram Nodnol . But surely a reverse Marathon should really be called an 'Athens'?