Well, I think I’m all set to run another sub-3 marathon (knocking on every piece of wood I can find). Of course the number 3 is arbitrary. For some, it might be 2:45 and for others it might be 3:45. But I know that for me, at my current age of 43, 3 hours is a worthy goal. I’ve done it twice now, and this time around I’m fairly certain that I can do it again.