Fly Fishing Trout Fly
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Fly Fishing Nymph

California: Lower Yuba River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Blue Winged Olive16 - 22           
Skwala Stonefly8 - 10           
Caddis (various)12 - 18      
Little Yellow Stonefly14 - 16          
Pale Morning Dun16 - 18         
Gray Drake10 - 12         
March Brown12 - 16           
Golden Stonefly6 - 10            
Click Fly Name to see patterns that imitate it.