Depends a lot on elevation an weather. Some years I am wearing my un-insulated hikers clear into November, and some years I have broke out the 12" 200 gram pack boots in September. I've found the 200 gram pack boots to be ideal for hunting in deeper snow (6"+). If you plan on sitting for a long time they are a little under-gunned, but typically I am moving relatively frequently enough to make for a good mix of warmth and maneuverability. If there is little or no snow then it's just un-insulated all leather hiking boots.