BWO or Baetis
Blue Wing Olive hatches are one of the most consistent and important mayfly hatches for trout, especially in spring and fall.
Best Flies for the Blue Wing Olive (BWO) Hatch
Best time: Overcast days, late morning to afternoon
Season: Spring and fall (can occur year-round)
Water: Slow to moderate currents, tailwaters, spring creeks
Trout behavior: Selective feeding on small mayflies and emergers
Match your fly to trout behavior—dry flies for surface feeding, emergers for selective fish, and nymphs when trout are feeding below.
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Hot Spot Pheasant Tail
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Like all the Pheasant Tail patterns, this one has a spot in every trout fisher's fly box. Hot spots make more sense that one might think at first...
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Blue Wing Olive Assortment--36 Flies #6
$36.25Original priceOriginal price $36.25 - Original price $36.25Original price$36.25 - $36.25Current price $36.2536 flies, representing the different stages of this prolific mayflies life-cycle. Flies range from sizes 16-20, based on availability. Includes: ...
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Picky Eater Perdigon - Tugnsten - Umpqua (Barbless)
$4.29Original priceOriginal price $4.29 - Original price $4.29Original price$4.29 - $4.29Current price $4.29Proudly designed by a Big Y Customer and Hood River local. "This fly features a simple body design that helps it sink quickly and a natural CDC col...
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Flymph BWO
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Flymphs have been around longer than most fly fishers realize. First coined by Pete Hidy in 1941, it is simply a floating nymph. With today's cla...
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Camden Baetis - Glass Bead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99A customer request, the Camden Baetis is great mayfly imitation. Made specifically for the prolific BWO hatches that most fly fisherman feverish a...
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Cripple Thor - Mayfly Dry Fly
$0.89Original price $0.99Original price $0.99 - Original price $0.99Original price $0.99$0.89 - $0.89Current price $0.89Blue wing olives are one of the most iconic hatches. Fly fisherman relish them as do the fish. Being so popular this one hatch has created a pleth...
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Crystal Hunchback-Beadhead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Extremely effective mayfly pattern especially in the Sierra’s. Originally designed by Andy Burk. Terribly hard to take a picture of... Yellowish...
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Missing Link Mercer's - Umpqua
$3.23Original price $3.59Original price $3.59 - Original price $3.59Original price $3.59$3.23 - $3.23Current price $3.23The Missing Link is that fly that works even when when the hatch might be not quite as expected. You may have thought PMDs were going to pop today,...
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Knock Down Dun BWO - Mayfly Dry Fly
$0.89Original price $0.99Original price $0.99 - Original price $0.99Original price $0.99$0.89 - $0.89Current price $0.89Designed to more closely imitate a true mayfly, more importantly Blue Wing Olives. The body is carefully segmented, olive dub is used for the tho...
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S&M-Beadhead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Sinks quickly and catches fish. Tested on the Yuba and Feather Rivers in California Color contrast and flash, this will scream 'pick me' wh...
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Barr's Emerger BWO - Glass Bead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Barr’s BWO Glass Bead The Barr’s BWO Glass Bead is a subtle, effective mayfly pattern designed for selective trout feeding on Blue-Winged Olive nym...
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Silver Streak
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99One of the hottest bwo emerger patterns. Popular from Sierra's to Arkansas and points east and west north and south. Excellent for dropper combo....
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Slim Pickens-Beadhead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99This pattern is brought to us from one of our wholesale customers who raves of its success throughout the Midwest. An excellent mayfly imitation,...
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Lil Amigo - RIO
$3.25Original priceOriginal price $3.25 - Original price $3.25Original price$3.25 - $3.25Current price $3.25Part of being an exceptional fly creator means designing flies that are meant for you and your fly box only. That's precisely how RIO's signature t...
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Christiaens' GT Adult - Montana Fly Co - Mayfly Dry Fly
$2.93Original price $3.25Original price $3.25 - Original price $3.25Original price $3.25$2.93 - $2.93Current price $2.93It's a great all-around mayfly dry The klinkhammer-style curved hook leaves much of the fly's body under the surface, represents a struggling emer...
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Silver Bullet Baetis - Tungsten - Umpqua (Barbless)
$3.65Original priceOriginal price $3.65 - Original price $3.65Original price$3.65 - $3.65Current price $3.65"The Silver Bullet Baetis is a sleek, fast sinking pattern perfect for hanging below a bushy dry, or on a nymph rig. This simple fly is durable, ...
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Slam Dunk BWO
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Blue Winged Olives are the most important food source for trout. BWOs hatch from early fall through late spring and provide many trout with the bu...
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Golden Child - RIO
$2.49Original priceOriginal price $2.49 - Original price $2.49Original price$2.49 - $2.49Current price $2.49Part of being an exceptional fly creator means designing flies that are meant for you and your fly box only. That's precisely how RIO's signature t...
View full details$2.49Original priceOriginal price $2.49 - Original price $2.49Original price$2.49 - $2.49Current price $2.49Value must be grater than or equal to 1. -
Flash Spinner BWO - Mayfly Dry Fly
$0.98Original price $1.09Original price $1.09 - Original price $1.09Original price $1.09$0.98 - $0.98Current price $0.98Flash Spinner BWO is much like a spinner, but with much more realistic wings. Spinners are the adult stage of mayfly life that involves reproduct...
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Slim Pickens
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99This pattern is brought to us from one of our wholesale customers who raves of its success throughout the Midwest. An excellent mayfly imitation,...
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Parachute Extended Body BWO - Solitude - Mayfly Dry Fly
$2.37Original price $2.63Original price $2.63 - Original price $2.63Original price $2.63$2.37 - $2.37Current price $2.37This fantastic little dry fly for the pickiest trout. Soft and realistic, this is a proven winner. Customer requested, this one should have been i...
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401K Baetis - Umpqua - Mayfly Dry Fly
$3.20Original price $3.55Original price $3.55 - Original price $3.55Original price $3.55$3.20 - $3.20Current price $3.20Designed with selective fish in mind, the 401K Baetis pays dividends for anglers. A high vis wing along with CDC and hackle keep the fly riding low...
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Fabio's Dun Deal - Rainy's
$3.59Original price $3.99Original price $3.99 - Original price $3.99Original price $3.99$3.59 - $3.59Current price $3.59A very successful BWO pattern, even in the slowest, pickiest of rivers.
$3.59Original price $3.99Original price $3.99 - Original price $3.99Original price $3.99$3.59 - $3.59Current price $3.59Save 10%Value must be grater than or equal to 1.
Blue Wing Olive (BWO) hatches often bring out selective trout, especially on pressured rivers and tailwaters. Matching size, profile, and presentation is usually the difference between refusals and eats. Most BWO fishing happens in sizes 16–20, with emergers outfishing dries when trout are feeding subtly in the film. Target softer seams, eddies, and slower edges during active hatches.
BWO hatches peak in spring and fall and are strongest during overcast or rainy weather. These mayflies can hatch multiple times a year and often produce longer, more consistent windows than other mayflies.
Trout key in on specific stages of the insect, so adjust your flies as their behavior shifts. Use dries when fish are rising confidently, switch to RS2s or emergers during subtle sips, and downsize if fish are refusing your presentation.