I would add one of the more famous pieces of Fly Fishing Only Water - the North Fork of the Stillaguamish. However, it is important to note that the North Fork fishery is fly fishing only for a specific period of time during the year and the Kalama has 2 (I think) specific areas of fly fishing only. I'm not sure if there is any further caveats on the Hoko.
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"You're not a g*dda*n looney Martini, you're a fisherman"

R.P. McMurphy - One Flew Over The Cuckoo's Nest