It depends on which layout and which division you're talking about. If you're wondering because of Hab/Rec, and you're playing MA1, anything 57 or better on either course is *very* good. For Pro, 54 or better is *very* good. For the 27 hole layout a very good MA1 score would be a 85 or better, and a very good Pro score would be 80 or better.
Hope this helps.