Then you shouldn\'t use the word marathon for your race. It\'s more of a cross-country sorta thingie... Marathons have fixed racetracks and any deviation from them leads to disqualification. As I see it, you are going to just let the folks run as best as they can, hoping that noone will get killed? No security measures? meh... I apply for the position of an independent regularity control entity. If you have any need for it, that is. but you\'ll need much more than that if you are intent on organizing manifestations of this type in the future (which IMHO is a great thing to do).