What flies are hatching on the Grande Ronde River right now?

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

What's the current flow on the Grande Ronde River?

The Grande Ronde River is running at 576 CFS at the Grande Ronde at Troy gauge. Readings update every 15 minutes from the USGS Water Services API.

Is the Grande Ronde River fishable today?

Grande Ronde River is rated marginal right now. Flow is 576 CFS at the Grande Ronde at Troy gauge. Go in prepared — heavier tippet, cautious wading, or target edges and seams.

Grande Ronde River Fly Fishing Conditions

Live Conditions

Grande Ronde River — Grande Ronde at Troy

Marginal

576CFS

Discharge

4.01ft

Gauge Height

66.6°F

Water Temp

Updated 55 min agoView on USGS ↗

7-Day Flow

→ Stable

RisingFallingStable

24-Hr Pressure

28.19 inHg · → High/stable

Falling (good)RisingHigh/stable

Voluntary Catch-and-Release Advisory

Water temperature is at or above 65°F. At these temperatures trout are physiologically stressed and have a higher post-release mortality rate. Consider waiting for cooler conditions — early morning or evening — or choosing a tailwater with regulated temperatures.

Local Weather

96°FOvercast

Wind 6 mph28.19 inHg Low & stable

Tough conditions — fish deep

Today

☁️

Overcast

98° / 67°

Tomorrow

☁️

Overcast

100° / 72°

Fri

🌦️

Drizzle

98° / 72°

Sat

☀️

Clear sky

102° / 70°

Cold front incoming — go deep with nymphs, surface activity likely slow.

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.

4

Time of Day

Using: 576 CFS · 66.6°F · PMDs continue. Caddis. Hopper season opening. Hot canyon water — early starts.

What should I pack?

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

🪰 Hatch Calendar

Grande Ronde River · July · Summer

Full calendar →

🟢 Active now at 66.6°F water

Caddis

🟡 Approaching — within 5°F of trigger range

Pale Morning Dun

Select month

JanDec

PMDs continue. Caddis. Hopper season opening. Hot canyon water — early starts.

PMDCaddis

🟢 Active · 🟡 Approaching · ⚪ Seasonal only

River Map

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

About Grande Ronde River

Remote Eastern Oregon canyon river — summer steelhead and wild redband rainbows in a desert canyon along the Oregon–Washington border. Classic two-handed swing water with light pressure and big country.

SalmonflyGolden StoneCaddisPale Morning DunBlue-Winged OliveOctober CaddisMahogany Dun

Regulations

Wild steelhead must be released. Combined Angling Tag required for steelhead. Nez Perce treaty waters — respect tribal boundaries.

Learn More

Guides to help you fish Grande Ronde River with more confidence.