Beaverkill River · hatch chart
May and June for dry flies; mid-September to November for streamers and olives
By month
JanFebMarAprMayJunJulAugSepOctNovDec
| Month | Insect | Stage | Size | Time | Intensity |
|---|---|---|---|---|---|
| Apr | Blue Quill (Paraleptophlebia) | Dun | #16-18 | 13:00-16:00 | |
| May | Hendrickson (Ephemerella subvaria) | Dun and spinner | #12-14 | 13:00-17:00 | |
| May | March Brown (Stenonema vicarium) | Dun | #12 | 11:00-15:00 | |
| Jun | Green Drake (Ephemera guttulata) | Dun at dusk | #10-12 | 20:00-22:30 | |
| Jun | Isonychia bicolor | Dun | #10-12 | 17:00-21:00 | |
| Jun | Sulphur (Ephemerella invaria) | Dun | #14-16 | 19:00-21:00 | |
| Sep | Blue-Winged Olive (Baetis) | Dun | #18-20 | 13:00-16:00 | |
| Oct | October Caddis (Pycnopsyche) | Adult | #10-12 | 18:00-21:00 |
Flow and visibility
The Beaverkill has no dam, so it lives and dies by rain. Spring flows are good; by mid-July the river is often down to 150 cfs and above 22°C in the afternoons, at which point the correct decision is to go and fish the Delaware tailwater instead. A heavy June thunderstorm will bring it up and cool it for two or three days — those are the days to be there.
The insect plate
