I think the yardage depends on what the golfers hadicap index would be. For the low handicap player, I think you could push the par 4 back tee another 20 to 25 yards deeper. But for a mid or high level handicap, like myself (12), par fours that are in the 440-450 range are plenty challenging. With a good drive, I would probably have a 5 or 6 iron for the approach shot.
Sean,
anecdotally, this might be your answer.
Randy asked about 500 yards, presumably to test the elite player, and it seemed like 500 yards was a barrier he was reluctant to get to for a par 4
(despite the fact he's at altitude)
When I was 21 years old at presumably the prime of my length, 500 yards was a driver and a 3 wood (maybe not at altitude)
Now you have a 12 handicap who despite the fact that he no doubt receives a shot on the hole
, is suggesting that 450 is plenty challenging for him because that's driver and a 5-6 iron.
So now we have to build a par 5 to test the second shot long iron capabilities of a 12 handicapper, because driver 6 iron is challenging enough for a par 4?
That same 450 used to be driver 2-3 iron for me, or for that matter even Hogan at Merion
Now it's a driver-7 iron, (actually an 8 but only because today's 8 is a 7
)
That said I'm advocatng more holes like NGLA has/had 480-520 yarders that are 5's on the card (there were 5 before, but I know they've changed a par or two since I was there)
Understand I'm not advocating for more total length, just more short 4's and the occasional long 2 shotter.
The UK/Irish courses have a lot of this par 4/5.
The idea that an 18 handicap should be able to reach any/every green in regulation "if he just plays the right tees" repulses me, and leads to tees littered all over the place.
Of course I'd prefer to see a ball/driver rollback so there wasn't such a disparity between long and short hitters.