Last weekend, watching the UK Sky TV coverage of the Hobda Classic, one of the commentators was bemoaning the 240 odd yard par-3 and said he had never seen a great par-3 over 200 yards long.
I think he has a point.
Postage stamp, 7th at Pebble Beach, 17th at Sawgrass, if you like that sort of thing. The longest great 3 I could think of was the 4th at RCD, 211 off the backs. But does the general point stand?