Attempts were made to stock Pacific salmon in the Great Lakes at various times starting in the late 1800's. The present salmon fishery in the Great Lakes started in Michigan's Platte River in 1966 when coho were introduced as a predatory species in hopes of the exploding alewive population. Chinook salmon were introduced a year later and the rest, as they say, is history. Here is a group of fish waiting behind the Platte River weir where some will be collected for eggs and others allowed to pass into the upper river.
Jon Ray of Mangled Fly Media recently did a short video on fly fishing for king salmon in Grand Traverse Bay. Check it out at http://www.youtube.com/watch?v=7hVH8JnDcjk