I see that in the steelhead regulations that there are no seasons for steelhead on the Lochsa and Selway rivers. However, Can you catch and release steelhead as long as you follow the general rules for those waters?

Answer:

The answer is no.  In Idaho, specific wording in code makes it illegal to fish catch-and-release for anadromous (ocean-going) salmon or steelhead if there is not a defined season.