Another great old man was the late Cliff Young. A farmer, he entered a Sydney to Melbourne ultra-marathon ( that took 5 days to complete) when he was 61.

Not only he finished the race, he also finished 1st and smashed the world record by hours!. He even gave away his prize money to the other runners.

http://www.my-inspirational-quotes.com/inspirational-stories/cliff-young-a-farmer-who-inspires-a-nation/