Fly Fishing Trout Fly
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Fly Fishing Nymph

Montana: Bitterroot River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Black Stonefly12 - 14            
Blue Winged Olive18 - 20             
Olive Stonefly10             
Blue Quill16 - 18           
Golden Stonefly8 - 10            
Salmon Fly4 - 6            
Yellow Sallie14 - 16            
Pale Morning Dun16 - 18            
Western Green Drake10 - 12             
Trico20 - 24           
Blue Winged Olive20 - 22            
Click Fly Name to see patterns that imitate it.