50 states and 13 provinces · 3,057 gauged waters · 304 written-guide gauges reporting now
What is your river doing right now?
Live flow and temperature for 3,057 gauged rivers and lakes across the United States and Canada, straight from their government gauges, with hatch charts, regulations and angler reports. Type a water to jump to it.
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3,052 gauged waters · 305 written guides reporting
Hatching now · Oct
What is coming off this month
Counted across all 329 river hatch charts on the site. Peak means the insect is at its best on that water this month, not merely present.
Blue-Winged Olive
peaking on 181 rivers, active on 44 more
181/329
Midge
peaking on 53 rivers, active on 112 more
53/329
Sculpin
peaking on 28 rivers, active on 28 more
28/329
Minnow
peaking on 16 rivers, active on 10 more
16/329
October Caddis
peaking on 16 rivers, active on 4 more
16/329
Crayfish
peaking on 14 rivers, active on 21 more
14/329
Flows read in context
Every river publishes its own ideal range, so today's number is judged against that water rather than left as a raw figure.
Only the readings that exist
Water temperature is reported by 36 of the 91 gauges. Where a gauge does not measure it, the page says so instead of printing a number nobody measured.
Hatch charts per river
Month-by-month insect activity for all 92 waters, with the fly patterns that match each hatch on that specific river.