What flies are hatching on the Waterloo Creek right now?

Current and seasonal hatches on the Waterloo Creek include Blue-Winged Olive, Hendrickson, Sulphur. Use the AI Hatch Advisor on this page for a live, temperature-aware recommendation.

What's the current flow on the Waterloo Creek?

The Waterloo Creek is running at currently unavailable — check the USGS gauge at the primary station for the latest reading. Readings update every 15 minutes from the USGS Water Services API.

Is the Waterloo Creek fishable today?

Live conditions for Waterloo Creek are unavailable right now. Check the embedded gauge widget on this page for the latest data.

Waterloo Creek Fly Fishing Conditions

No Data

Gauge data unavailable for Waterloo Creek.
Check USGS directly ↗

What should I fish today?

⚡ AI

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

Time of Day

Using: BWOs returning

What should I pack?

Rod, flies, tippet, and safety gear specific to today's Waterloo Creek conditions.

🪰 Hatch Calendar

Waterloo Creek · September · Early Fall

Full calendar →

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

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JanDec

BWOs returning (size 18-20). Tricos continuing. Cool nights — wild browns active.

Blue-Winged OliveTrico

River Map

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

About Waterloo Creek

Waterloo Creek in Allamakee County is Iowa's most-famous catch-and-release trout stream — artificials only, catch-and-release only in posted sections, and a flagship of decades of Iowa DNR habitat work. Small, cold limestone-spring water with strong populations of wild brown trout and brook trout in headwater refuges. The USGS gauge was downgraded to stage-only in 2023 — no live CFS data is available, so check with regional fly shops before driving.

Blue-Winged OliveHendricksonSulphurCaddisTricoTerrestrials

Regulations

ARTIFICIALS ONLY, CATCH-AND-RELEASE ONLY in posted sections — Waterloo Creek is Iowa's most-protected Driftless trout stream. Iowa fishing license required (~$22 resident annual + ~$14.50 trout stamp; 2026 fee changes — verify current rates on Iowa DNR before publishing). Year-round trout season. Verify Allamakee County section-by-section regulations in current Iowa DNR trout regulations. USGS gauge downgraded to stage-only in 2023 — no live CFS data; check with regional fly shops before driving.

Learn More

Guides to help you fish Waterloo Creek with more confidence.