On the lawn, a thick layer of snow will not harm it, provided that there aren’t leaves left on the surface. … The last mowing should always be a little shorter. (the problem I’ve had is that autumn doesn’t seem to know when to quit, and I end up with 2 or 3 last cuts. Don’t cut the lawn too short of course, as this makes it more susceptible to frost damage if there is little snow. … If you walk on the lawn regularly during the winter, it is also advisable to remove the snow from these paths. Snow that is hard packed by foot prints on the lawn could lead to damage to the grass plants. (it could also lead you down a garden path) [From Turf King- Hamilton- Lawn Care: Does all this snow hurt my lawn?