I didn't spend too much time on this one, so I can't add a whole lot.
From the Oakmont website:
Green 382
Blue 349
White 347
Red 275
Use a long iron off the teeing ground and approach this green with short irons. This very udulating green makes putting difficult, but there should be some birdies here.From my memory, the one thing that sticks out is the hole does not seem nearly as straight in person as the diagram indicates. From the tee, it feels like it goes right, and then back to the left. The fairway also features a slight rise that obscures the landing area a bit. It's another sub-400 yard par 4 that still plays tough, mostly because of the well-defended green.
The approach to the green features one of the few true forced carries on the course, playing over a gulley. The green looks miniscule from the fairway, unless you hit it long enough or far enough right, then it opens up a bit.
I think I have a photo from the 5th fairway, I'll try to find it and post it shortly.
New feature: the overhead course diagram, with the hole in question highlighted: