Free Resource · Updated 2026
The Androscoggin River in northern New Hampshire is one of the premier fly fishing rivers in the state. Flowing through the North Country, it offers a mix of large freestone pools, fast runs, and quality brown trout fishing. The river has recovered dramatically from its industrial past and now hosts strong hatches from spring through fall.
That's what to tie on. Now see where to fish today.
See the top 10 trout rivers to fish right now
Free app. Premium adds gage analysis and more maps.
On a computer? Scan with your phone camera to get the app.
Androscoggin River Hatch Calendar at a Glance
The Androscoggin begins at Umbagog Lake on the Maine-New Hampshire border and flows south through Errol, Dummer, and Berlin. The Errol area is a favorite among fly fishers for its combination of accessible water and reliable hatches.
Quill Gordons and Hendricksons arrive in late April and May, overlapping with March Browns as temperatures climb. Green Drakes emerge in late June on the better runs. Summer brings Light Cahills and some caddis activity.
Fall fishing on the Androscoggin can be exceptional. Isonychia hatches in September and BWOs through October are consistent. The river fishes well into November during mild years.
See the full New Hampshire Fly Hatch Chart for hatch timing across all of New Hampshire's top trout streams.
Check Conditions Near Androscoggin RiverWhat to Fish
Ephemera guttulata
The Green Drake hatch on the Androscoggin is one of the North Country highlights of the fly fishing year. Evening hatches on the Errol area pools bring large browns to the surface.
Recommended: Green Drake #10
Stenonema vicarium
Afternoon March Brown hatches in May overlap with Hendricksons on the Androscoggin and can produce excellent fishing in the long runs below Errol.
Recommended: March Brown #12
Isonychia bicolor
Isonychia is one of the best fall patterns on the Androscoggin. Fish key in on the large naturals swimming to the surface and take the wet fly swing as well as the dry.
Recommended: Slate Drake #12
Baetis spp.
Consistent BWO activity at both ends of the season. Overcast fall days in October can produce impressive rises across the Androscoggin flats.
Recommended: BWO Parachute #18-20
Common Questions
The Errol area near the Umbagog Lake outflow is widely considered the best stretch. Access is good and the trout population is strong. Below Berlin the water is wider and gets less attention.
Atlantic salmon have been stocked in some sections historically. Brown trout are the primary sport fish for fly fishers today. Brook trout are found in smaller tributaries feeding the main river.
May through June for spring hatches and September through October for fall fishing are the prime windows. The river fishes well on mild days in any month between ice-out and freeze-up.
Live readings from USGS gages on the river.
FlyFishFinder combines hatch knowledge with live gauge alerts, Prime condition indicators, and real angler intel so you show up on the right day, not the wrong one.
Know Before You GoFree Trial · Cancel Anytime · $0 Charged Today
