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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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  • Juju Baetis Tungsten - Umpqua

    $3.75
    $3.75 - $3.75
    $3.75 - $3.75
    $3.75

    One of the most infamous baetis patterns in history. This pattern has been one of the top producers of picky fish across North America. Baetis are ...

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    $3.75 - $3.75
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    $3.75
    Value must be grater than or equal to 1.
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    Film Critic - Umpqua

    $3.32
    $3.69
    $3.69 - $3.69
    $3.69
    $3.32 - $3.32
    $3.32

    Bob Quigley, the king of the "film” designed the Film Critic to match mayflies at their most vulnerable stage of the hatch, while emerging from nym...

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    $3.69
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    $3.69
    $3.32 - $3.32
    $3.32
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  •

    Darth Baetis - Umpqua

    $3.59
    $3.59 - $3.59
    $3.59 - $3.59
    $3.59

    This juicy little Baetis pattern produces fish under the spookiest of circumstances. From Colorado to Maine, baetis nymphs are a huge source of foo...

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    $3.59
    $3.59 - $3.59
    $3.59 - $3.59
    $3.59
    Value must be grater than or equal to 1.
  •

    Picky Eater Perdigon - Tugnsten - Umpqua (Barbless)

    $4.29
    $4.29 - $4.29
    $4.29 - $4.29
    $4.29

    Proudly 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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    $4.29
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    Missing Link Mercer's - Umpqua

    $3.23
    $3.59
    $3.59 - $3.59
    $3.59
    $3.23 - $3.23
    $3.23

    The 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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    $3.59
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    $3.59
    $3.23 - $3.23
    $3.23
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  •

    Silver Bullet Baetis - Tungsten - Umpqua (Barbless)

    $3.65
    $3.65 - $3.65
    $3.65 - $3.65
    $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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    $3.65 - $3.65
    $3.65
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    401K Baetis - Umpqua - Mayfly Dry Fly

    $3.20
    $3.55
    $3.55 - $3.55
    $3.55
    $3.20 - $3.20
    $3.20

    Designed 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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    $3.20
    $3.55
    $3.55 - $3.55
    $3.55
    $3.20 - $3.20
    $3.20
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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.

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