(147) putah Creek (Solano and Yolo cos.) from Solano Lake to Monticello Dam. Last Saturday in April through Nov. 15. 5 Nov. 16 through the Friday preceding the last Saturday in April. Only artificial lures with barbless hooks may be used.
direct from fishign regs, basically last weekend of april. However, this is just my opinion but fly fisherman should only use barbless. Barbless= easier to get hook out and thus the faster you can get the fish back in the water, which is in the end healthier for the fish. Also, although you may loose a few to some nasty headshakes you get much better hooksets with barbless hooks. Just my opinion though
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all of a man's addictions end and begin when he learns to fly fish
It's not too clear in the above post, but the regular trout season is from the last Saturday in April through November 15th. Outside of regular trout season only artificial lures with barbless hooks can be used.
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"Nothing makes a fish bigger than almost being caught."