Hatch calendars by river
New Hampshire trout hatch calendars.
1 river covered. Each calendar runs through the full year of mayfly, caddis, stonefly, midge, and terrestrial activity — with peak windows, fly patterns, and water temperature triggers.
What's hatching in New Hampshire — May
Rivers
New Hampshire hatch waters.
Live water temp + hatch alerts.
Bield Fish reads USGS gauges and surfaces hatch alerts as water hits the trigger window.