Hole 4 was removed, but without mentioning it the proceeding signs have the wrong numbers.
There are only 12 playable holes but until they get new signs (or a new hole 4) this is the most accurate way to tell what hole you're on.
Hole 12 (second to last hole):
A long drive here will probably put you out of bounds.
Try to land your drive just past the lone tree to save yourself going OB on the downhill behind the pin.