Trophy Walleye chasers know that as temps get really cold big walleye make a similar migration as they do in the spring to spawn, but in the fall, to feed.
Great Lakes moving water from the mouth of the St. Lawrence to the Niagara and Detroit Rivers can produce some excellent fishing. The key to catching these walleye is having the right water/weather conditions. Strong fall winds and make for very turbit water which can really shut walleye down.
This is the time to fish jigs/plastic grubs close to the bottom like the Lunker City Fin-S Fish and the Fishing Complete Mad Tom. Blade-baits and vertical jigging spoons can also work well. The key is to fish all these close to the bottom.