Dry FlyintermediateGreat Lakes
Blue-Winged Olive (BWO)
$3.50
Available Sizes#16 - #22
Color Variations
Olive/DunGray/Olive
The Blue-Winged Olive hatch happens on the grayest, drizzliest, most miserable days of spring and fall -- precisely the days when sensible people stay home. If you are standing in a Great Lakes tributary in light rain watching size 18 mayflies drift past your waders, you are either a trout fisher or profoundly lost. The trout love these conditions. You will too, once you feel that first take.
Quick Facts
TypeDry Fly
Difficultyintermediate
SeasonsSpring, Fall
Target SpeciesBrown Trout, Rainbow Trout
Sizes#16 - #22
Best LocationsAu Sable River, MI; Pere Marquette River, MI; Brule River, WI
Where to Fish It
Au Sable River
MI · Freestone River
Pere Marquette River
MI · Freestone River
Brule River
WI · Freestone River
Map unavailable. Locations for Blue-Winged Olive (BWO): Au Sable River, MI; Pere Marquette River, MI; Brule River, WI
Related Reading
region guide
Great Lakes Fly Fishing: From Hex Hatches to Musky
The Great Lakes region offers a staggering diversity of fly fishing — from legendary Hex hatches on northern Michigan rivers to chrome steelhead on Lake Erie tributaries and trophy muskellunge in the bays. This is the complete guide to fishing the freshwater coast.
hatch guide
The Complete Guide to Mayfly Hatches
Mayflies are the foundation of trout-stream entomology. This guide covers every major hatch — BWOs, PMDs, Green Drakes, Sulphurs, Tricos, and Hendricksons — with the biology, timing, and fly selections you need to fish them effectively across the country.
hatch guide
The Hex Hatch: After Dark on the Great Lakes
The Hex hatch is the defining event of Great Lakes fly fishing — a massive emergence of North America's largest mayfly that happens after dark and brings the biggest brown trout of the year to the surface. This is how to prepare for, find, and fish the most anticipated hatch in the Midwest.
technique
Water Temperature: The Master Variable
Water temperature controls everything. Metabolism, feeding intensity, insect emergence, dissolved oxygen, where fish hold, and whether they'll eat your fly. Understanding thermal dynamics across freshwater and saltwater systems is the single most reliable way to predict fishing quality before you even leave the truck.
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