What flies are hatching on the Gallatin River right now?

Current and seasonal hatches on the Gallatin River include Salmonfly, Golden Stone, Caddis. Use the AI Hatch Advisor on this page for a live, temperature-aware recommendation.

What's the current flow on the Gallatin River?

The Gallatin River is running at 465 CFS at the At Gallatin Gateway gauge. Readings update every 15 minutes from the USGS Water Services API.

Is the Gallatin River fishable today?

Yes — Gallatin River is rated fishable right now. Current flow is 465 CFS at the At Gallatin Gateway gauge.

Gallatin River Fly Fishing Conditions

Live Conditions

Gallatin River — At Gallatin Gateway

Fishable

465CFS

Discharge

1.58ft

Gauge Height

—

Water Temp

Updated 34 min agoView on USGS ↗

7-Day Flow

→ Stable

RisingFallingStable

24-Hr Pressure

25.42 inHg · → High/stable

Falling (good)RisingHigh/stable

Local Weather

38°FOvercast

Wind 5 mph25.42 inHg Low & stable

Tough conditions — fish deep

Today

🌦️

Drizzle

44° / 36°

0.02"

Tomorrow

☁️

Overcast

46° / 32°

Tue

☁️

Overcast

49° / 32°

Wed

☁️

Overcast

47° / 34°

Weather by Open-Meteo · No API key · Updated every 30 min

What should I fish today?

⚡ AI

AI-powered recommendation using today's live flow, temperature, and hatch data.

9

Time of Day

Using: 465 CFS · Midges. BWOs on mild afternoons. Sections beginning to ice. Late-season fishing for the dedicated.

What should I pack?

Rod, flies, tippet, and safety gear specific to today's Gallatin River conditions.

🪰 Hatch Calendar

Gallatin River · November · Late Fall

Full calendar →

Showing typical dates — water temperature data unavailable for live hatch predictions.

Select month

JanDec

Midges. BWOs on mild afternoons. Sections beginning to ice. Late-season fishing for the dedicated.

Blue-Winged OliveMidge

River Map

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USGS Gauge (click for site ID)Fishing Access / SectionScroll to zoom disabled — use map controls

About Gallatin River

Wade-only freestone flowing from Yellowstone Park through Big Sky to Three Forks (joining the Madison and Jefferson). Roadside pocket water along Highway 191 — accessible, scenic, and full of wild rainbows and browns.

SalmonflyGolden StoneCaddisPale Morning DunHopperBlue-Winged OliveMidge

Regulations

Wade-only — no float fishing on the Gallatin. Standard Montana fishing license required.

Learn More

Guides to help you fish Gallatin River with more confidence.