Where do steal head migrate?

Answer 1

Eventually, they go out to the oceans. But while they are getting large enough to do that, they stay in the rivers and creeks that they were born in. When they are large enough to go to sea, they travel downstream and live in the ocean until they return to spawn. Some steel head and some salmon never leave the fresh water if they do not mature enough to go to sea. It may be environmental or hereditary.