Fly Fishing Trout Fly
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Fly Fishing Nymph

Utah: Provo River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Midges (various)20 - 28        
Blue Winged Olive16 - 20           
Olive Stonefly10 - 12            
Golden Stonefly8 - 10           
Yellow Sallie12 - 14            
Pale Morning Dun14 - 18            
Western Green Drake10 - 12             
Terrestrials (various)6 - 18            
Click Fly Name to see patterns that imitate it.