For most anglers, muskie fishing ends for a while once the lakes start to freeze up. Some anglers will fish for muskie in the rivers in the winter and the key is to slow down and most anglers will have better success by fishing with live baits from late afternoon through the evening because water temperatures are warmer than during the morning hours.
Down south, there are some waters that provide some good muskie fishing too, however, they usually get pressured quite a bit due to the fact that there aren’t very many places to fish for muskie in the south.