I always find it difficult to track the 'last' of anything. I did note that my killing frost was in early November, so my guess is last mow was sometime toward mid to late October. We haven't had too much freezing weather this year. We did have a cold snap in early December, which often brings about river otters in our farm pond. I have to wonder how often they cruise through when the pond is not frozen - although it sure is entertaining to watch them cavort on the ice. Usually it's a pair, sometimes three.