Hole 13 at Rock Harbor Golf Course Rock Course is part of a U shaped double green that is shared with hole 12 of the Boulder Course. The pin was on the back right part of the green that slopes towards the ponds that the green wraps around. My goal was to hit just right of the pin and let it settle below the pin for a chance at birdie. When the ball hit the green it bounced slightly up the hill then turned and rolled into the cup. Our entire group yelled and scared the foursome that was putting out on the side of the green.