See here for one of the many articles done before & after the recent Cork Marathon regarding Kay and Joe O'Regan (ex-Kinvara) of Enniscorthy [both proud Slaney Olympic club stalwarts] and their finishing the full distance, both 80. I had the great pleasure of meeting them 5 or 6 years ago out in Connemara after Kay finished that full there. Wonderful people, both full of the joys of life. RTE's Nationwide did a lovely 10 minute interview with them the week befor the race too, which may still be on their web site via their player.
I will also nod in the direction of Damien Coleman od Blackrock who soloed the sliotar around the entire course in a little under 4.5 hours. Cork needs all the hurlers they can muster at the moment ;-).