Match the Hatch
Pick a river and a month — we cross-reference its fingerprint, conditions, and seasonality into a ranked plan.
River
Month
Conditions
— cfs · —°F
The Read
July on the Beaverhead: lead with the Spotted Sedge (100% likely) and fish the adult. Keep Pale Morning Dun patterns rigged as the second act.
01
Fish the Adult
Splashy rises at dusk mean caddis. Skate an Elk Hair through the riffle tops.
Elk Hair Caddis #14-16
$2.95CDC Caddis #16
$3.2502
Fish the Dun
Steady, rhythmic rises in tailouts. Downstream reach casts beat drag on flat water.
Parachute PMD #16-18
$3.25Comparadun PMD #16
$3.1503
Fish the Adult
Fish tight to grass banks on windy afternoons, with a hard splat — the sound is part of the trigger. Hang a nymph off the back.
Dave’s Hopper #8-12
$3.50Chernobyl Ant #8-12
$3.5004
Fish the Pupa
Fish suspend to eat ascending pupae. Fish two tiny pupae under an indicator in winter pools.
Top Secret Midge #20-22
$2.95WD-40 #20
$2.7505
Fish the Adult
Dead-drift deep along weed edges. A flow bump that tears weed loose triggers the best scud fishing of the year.
Scud #14-18
$2.75Sowbug #16-18
$2.7506
Fish the Dun
Duns emerge at first light and molt within the hour. A short pre-game before the main event.
Trico Dun #20-22
$3.1507
Fish the Adult
Cast to the bank, get deep fast, and strip with pauses. Follows that do not commit usually mean you are stripping too fast, not that the fly is wrong.
Woolly Bugger #4-10
$3.50Sculpzilla #4-8
$4.9508
Fish the Adult
Fish a worm deep and heavy when the water comes up and colors. Swap to an egg below spawning gravel — and stay off the redds themselves.
San Juan Worm #12-16
$2.50Egg Pattern #14-16
$2.50≋ Waterlands · Hatch data blends USGS gauges, NOAA temps & regional emergence records
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