The par 3's at my home course, Bear Creek, in Murrieta, CA, are all quite difficult, with double bogey in the mix at any time for all of them.
Yardages are from the back (black) tees:
6) 147 yards. Plays directly down wind to a tiny, tiny green with a barranca hazard in front and a steep hill and rocks behind. the green is about 12 paces deep on the left side and about 6 paces deep on the right side. Controlling your short iron distance here is absolutely essential, and since the hole almost always plays downwind in the afternoon, you also have to spin the ball a considerable amount to hold the green
177 yards. Also directly downwind. Very funk green with a really cool shaved down collection area to the left of the green, and a barranca hazard left of that and deep bunkers/grass bunkers to the right.
12) 204 yards, into the wind. Gaping, deep bunkers in the center of the green. All kinds of nasty pin placements on this hole. Miss in the bunkers short, and bogey is about all you can hope for, with double and triple in the mix for even the best of players.
16) 212 yards, downhill to the most severely funky green I've ever played. Not really a very good green, but we're talking "difficult," not "great," right? LOL!
Again, double-bogey is in the mix here on all of these holes for even scratch and below players....