Colorado Fly Fishing
Where the data
meets the drift.
Live USGS stream conditions, an AI hatch advisor loaded with real gauge data, and beginner-friendly guides — all in one place.
Live Conditions
Updated every 15 min
Why this site
Built for anglers who want the data
Live Stream Data
Real-time CFS, gauge height, and water temperature from USGS sensors on every river. Know before you go.
Updated every 15 minutes
AI Hatch Advisor
Ask what to throw and get a specific answer — fly pattern, hook size, and timing — based on today's actual conditions.
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Built for Beginners
No gatekeeping. No bro energy. Clear explanations of what the data means and what to do with it.
Colorado rivers only, for now
🟢 Fishing Well Today
South Platte River
Colorado's most popular trout river. Technical dry fly water at Deckers, diverse sections from Eleven Mile Canyon to Cheesman Canyon.
Know what's hatching
Colorado Hatch Calendar
Month-by-month hatch charts for Colorado trout rivers. Blue-Winged Olives, PMDs, Caddis, Green Drakes — with matching fly patterns and hook sizes.
View Hatch Calendar →