I was fishing the AuSable on Monday at one of my favorite spots around 0800. I noticed some (many) minnows heading downstream. I thought this a bit odd. As I watched it become a steady stream of literally thousands that streamed by me heading towards the lake. Must have bee about 10 to 15 minutes before the stream ended. Could these be salmon? There were anywhere from 1 ½ to 2 ½ long. How long does it take after spawning that the fish would become that big?