Waterlands
River Intelligence · Entomology

Read the Water. Match the Hatch.

Every river has an entomological fingerprint — the bugs it grows, when they hatch, and how trout eat them. Learn the bugs, cross-reference live flows, and fill your box before you go.

Hatching NowPale Morning DunGreen DrakeTricoSulphurSmall Western Red QuillFlavGray DrakeCallibaetisSpotted SedgeGolden StoneYellow SallyBrown DrakePink LadyTerrestrialsScuds & Sowbugs
EncyclopediaHatch CalendarRiver FingerprintsMatch the HatchBug School
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Madison River
Quake Lake to Ennis · MT · USGS 06038800 · 44.8887, -111.5809
The Fifty-Mile Riffle. A freestone stonefly factory — salmonflies and goldens define June, caddis own summer evenings, and Baetis stretch the season at both ends.
1,460
CFS
60°F
Water Temp
4.6
Fair
Flow vs Hatch Likelihood
Flow CFS
Hatch %
7-day trend — flows rising, Spotted Sedge likelihood at 100% and climbing.
−7d
−6d
−5d
−4d
−3d
−2d
−1d
Today
The Fingerprint
Stonefly-dominant freestone. Biomass skews to big Pteronarcys and Hesperoperla in fast cobble; caddis carry summer; Baetis shoulder-season.
Fly Box for Right Now
Elk Hair Caddis #14-16
Spotted Sedge · Adult
$2.95
CDC Caddis #16
Spotted Sedge · Adult
$3.25
Yellow Sally #14-16
Yellow Sally · Adult
$2.95
Yellow Stimulator #14
Yellow Sally · Adult
$3.25
Parachute PMD #16-18
Pale Morning Dun · Dun
$3.25
Comparadun PMD #16
Pale Morning Dun · Dun
$3.15
Hatch Chart — Madison River
River-specific intensity: this water, these bugs. Click a bug for its full profile.
≋ Waterlands · Hatch data blends USGS gauges, NOAA temps & regional emergence records
USGS Real-time Data · Free to Start · No Credit Card