I did fish the Cowlitz.

We talked to several people who talked to several people. Nobody that we heard about touched a fish. We fished at Blue Creek for about 1 1/2 hours first thing this AM after running up from Massey Bar then tried various things back to Massey Bar. We saw several guides going up and down the river a lot, so I'm guessing they didn't do to well either. I hope this helps.
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Wear a PFD if you want to live.