Steelhead are rainbow trout that live in salt water and run freshwater streams to spawn (also spend their first parts of life in fresh water). Yes there are steelhead in the great lakes but, in all reality the are just a rainbow trout. In the great lakes, native rainbows spawn in the fall and steelhead spawn in the spring.
Thanks for the posts! Gives me a little edge over my son on this topic ( He's 15 and thinks he knows everything ) I don't know everything, but I've got the advantage of MFF for questions like these that I can't answer Thanks again! JD