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Yakima River and Rocky Ford Creek Hatch Charts

Hatches on any river will vary quite a bit from year to year and stretch to stretch. Typically on the Yakima hatches of most small Mayflies, small Caddis and Summer Stones will be stronger in the lower river and Green Drake, Golden Stone and Salmon Fly hatches will be stronger in the upper river. March Browns and Cahills tend to be more prolific in the middle stretch and October Caddis stronger in the middle and upper river.

Emerging Summer Ston

Hatches

Month

J

F

M

A

M

J

J

A

S

O

N

D

Scuds













Midges













BWO













Sulfurs













Calibaetis













Tricos













Damsels













Caddis













Terrestrials













PMD













Mahogany Dun













Rocky Ford Creek Hatch Chart

common name

scientific name   (Latin name)

J

F

M

A

M

J

J

A

S

O

N

D

Midges

Chironomidae













Winter Stone

Capnidae













Skwala

Skwala americana













Blue Winged Olives

Baetidae













March Brown

Rhithrogena morrisoni













Mahogany Dun

Paraleptophlebia













Caddis














Grannom-Mothers Day Caddis

Brachycentrus occidentalis













Grannom

Brachycentrus americanus













Little Tan Short-horned Caddis

Glossosoma













Little Sister Sedge

Cheumatopsyche













Spotted Sedge

Hydropsyche













Salmon Fly

Pteronarcys Californica













Big Yellow May

Heptagenadae













Terrestrials














Beetles














Ants














Bees and Wasps














Hoppers














Pale Morning Dun

Ephemerella excrucians / Ephemerella dorothea infrequens













Yellow Sally

Isoperla / Osobenus













Crane fly

Tipulidae













Golden Stone

Hesperoperla pacifica / Calineuria californica













Green Drake

Drunella doddsi / Drunella grandis













Summer Stone

Claassenia sabulosa













Caddis

Rhyacophilia













Pale Evening Dun

Heptagenia













Cahill














October Caddis

Dicosmoecus













Yakima River Angler Hatch Chart


J

F

M

A

M

J

J

A

S

O

N

D

Yakima River Hatch Chart

typical emergence intensity
heavier

lighter

Low water flows in the faster, freestone section below the lower hatchery diversion have significantly hurt the hatches in this stretch, this includes Sulfers, Tricos, BWOs, PMDs, Caddis and Mahogany Duns. Slow water Hatches above the diversion remain strong, this includes Callibaetis, Midges and Damsels.