Lots of great spots, again depends on what you are looking for. I would suggest the Toronto Islands or anywhere along the waterfront where you can cast for Pike. Make sure you have a net as you may be hoisting the fish up 4 or 5 feet in some spots. Otherwise you will have to cut your line and kiss a $10 Rapala goodbye.
Steelhead, Trout, try any of the tribs. Humber, Wilmot, Rouge, Duffins, Oshawa. Ganny will be opening soon.
Dirk...