As others have mentioned the view of Hamilton is limited by the escarpment and the Skyway Bridge and industry.
But just eyeballing a map, to the east I think it could be visible from much further. I'm not sure if you can see it from the top of the escarpment in Grimsby (25km), but there might be buildings in St. Catharines that offer a line of sight (50+ km), perhaps even the pier at Port Dalhousie. Must investigate.