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Gallatin Canyon

Updated 58m ago

Gallatin · Yellowstone National Park boundary to Spanish Creek / Gallatin Gateway

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Salmonflies Pteronarcys californica

Peak Favorable

Hook: #4-8 Starts ~56°F

Concentrated stretch of a few miles

Dries	Chubby Chernobyl #6-12 Improved Sofa Pillow #4-8 Orange Stimulator #6-10 Sofa Pillow #4-8
Nymphs	Bitch Creek Nymph #4-6 Kaufmann's Stone #2-6 Pat's Rubber Legs #4-8

Golden Stones Hesperoperla pacifica

Peak Favorable

Hook: #8-12

Slightly later than salmonflies

Dries	Chubby Chernobyl #6-12 Orange Stimulator #6-10 Yellow Stimulator #10-14
Nymphs	Pat's Rubber Legs #4-8 Prince Nymph #12-16

Yellow Sallies Isoperla

Hook: #8-16

Nymphs more important than adults

Dries	Yellow Stimulator #10-14
Nymphs	Montana Jig Sally #14-16 Yellow Sally Nymph #12-16

Caddis Tricoptera

Peak

Hook: #12-16 Starts ~54°F

Mother's Day hatch pre-runoff; resumes ~Jun 20

Dries	CDC Caddis #14-18 Corn Fed Caddis #14-18 Elk Hair Caddis #14-18 X-Caddis #14-18
Nymphs	Hare's Ear Nymph #12-18

Midges Chironomidae

Favorable

Hook: #18-26

Year-round; peak winter during warmest hours

Dries	Griffith's Gnat #18-22
Nymphs	Mercury Midge #20-22 Spanish Bullet #16-18 Zebra Midge #18-22

Report conditions: 867 cfs · 48.7°F · ▼ 2.0% 24h · ↓55% median

The Gallatin Canyon is fishing well with flows at comfortable levels (55-59% below median) and clear conditions. Water temp at 48.7°F is ideal for active feeding. Salmonflies are hatching in concentrated areas with Golden Stones following - fish large attractors like Chubby Chernobyls #10-12 with droppers during afternoon warmth. Nymphing with Pat's Rubber Legs #8-12 paired with smaller patterns like Zebra Midges #18-20 remains most consistent.

Conditions	Clear, Stable
Nymphing	Pheasant Tail #18, Griffith's Gnat #20, Zebra Midge #18, Juju Baetis #20
Dry Fly	BWO Comparadun #20, Purple Haze #16, BWO Sparkle Dun #20, Chubby Chernobyl #10-12
Streamer	Mini Dungeon #6-8, Woolly Bugger #10, Sparkle Minnow #6-8, Double Screamer #6

Based on current conditions and local shop reports · 21h ago

Conditions

Above Deer Creek (Big Sky)

1h ago

Clear

Flow	813 cfs · 5.65 ft · 53.4°F
Trend	↓47% med · ▼ 6.2% 24h
Wx	40° · 💨 7 NE · 🌧️ 0% · H: 62° / L: 37°

Near Gallatin Gateway

58m ago

Clear

Flow	1140 cfs · 2.46 ft
Trend	↓57% med · ▼ 5.8% 24h
Wx	50° · 💨 7 NNE · 🌧️ 0% · H: 77° / L: 45°

7-Day Flow

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