I've often wished there were some kind of recognition for running a mile (or 1500, esp. for women) in one's age. For instance, running 5:00.00 or faster on your 50th birthday; then you'd go up six seconds per year, and a half-second for each additional month.
I know Coghlan went sub-four at 40+, so he'd certainly qualify; and I don't think any 39-year-olds have gone 3:54 (except for 1500, of course), so maybe he's the youngest male to do it.
I'd guess that multiple 60-year-olds have broken 6:00.00; but it would be nice for people to get that recognition.
As to the oldest qualifier--maybe Larry Lewis? IIRC he was running (multiple) miles faster than 8:00 in road races, when he was 100+ years old.
I don't think I'll ever qualify for this, because I can't run at all--unless I can learn to walk faster, or live to 120, I think a mile under my age is unlikely. But maybe walking a marathon? I'd hope to be able to walk 26.22 in less than six hours at age 60...
BTW "shooting your age" in gold does indeed refer to a full 18-hole course, though probably one of the easier layouts--still at least 6,000 yards, though.
http://golf.about.com/od/faqs/f/ageshooters.htm