I have a question regarding the time limit for the marathon since this is my 1st marathon. The website overview page seems to say that the race has a 6.5 hour time limit but it also says that the roads will open and the water stations will stop at 2:30PM (5.5 hours). Then it seems to say later that the time limit had been extended to 6.5 hours. Is there a firm time limit and if so, can I ask what it is us less than stellar runners?