Massachusetts · Wild-trout stream

The Nissitissit

The Squannacook's wild-trout twin — a small, cold stream of native brookies and wild browns near Pepperell.

The Nissitissit runs cold and clear from New Hampshire into Massachusetts, joining the Nashua near Pepperell — a small, wooded wild-trout stream and the Squannacook's close cousin. It holds wild brown and brook trout and rewards the same careful, small-stream approach. The river has no USGS gauge of its own, so we watch the neighboring Squannacook for a regional read on conditions.

The water

About The Nissitissit

The Nissitissit runs cold and clear from New Hampshire into Massachusetts, joining the Nashua near Pepperell — a small, wooded wild-trout stream and the Squannacook's close cousin. It holds wild brown and brook trout and rewards the same careful, small-stream approach. The river has no USGS gauge of its own, so we watch the neighboring Squannacook for a regional read on conditions.

Regulations & Stamp

The Nissitissit holds designated catch-and-release, artificials-only wild-trout water; it crosses the NH/MA line, so carry the right state's license for where you stand. Confirm current MassWildlife (and NH Fish and Game) regulations.

Brookline, NH to Pepperell

The Nissitissit — Brookline, NH to Pepperell.
The Nissitissit — Brookline, NH to Pepperell.

Key access along the river

  1. BrooklineBrookline — road and bridge access to the Nissitissit through town.Get directions
  2. Nissitissit River Conservation LandNissitissit River Conservation Land — public land with walk-in access to the Nissitissit.Get directions
  3. Beaver DamBeaver Dam — a dam on the Nissitissit; a landmark to orient by, with a pool above and a run below.Get directions
  4. Nissitissit Meadow Conservation AreaNissitissit Meadow Conservation Area — public land with walk-in access to the Nissitissit.Get directions
  5. Covered Bridge Conservation AreaCovered Bridge Conservation Area — public land with walk-in access to the Nissitissit.Get directions

This week on the water

River Report

The current read on the water, with live flow and water temperature from the USGS gauge that frames the fishery, over the historical range for the date.

River Report

August 7, 2026

Nissitissit is running high for August — fish the soft edges and heavier flies until it drops.

Nissitissit is reading about 124 cfs at the Squannacook, West Groton gauge this week — well above the typical range for the date. Expect pushy current and some color. The trout are still there, but they'll be tucked along the banks, behind boulders, and in the softer seams where they can hold without fighting the whole river. This is small, wild water — intimate and clear, where a quiet approach and a short, accurate cast matter far more than distance.

August on the water: The most technical water of the year — long leaders, ants, beetles, a low profile. Right now that means Foam Beetle, Ant, Parachute Adams, and Griffith's Gnat — carry a couple of sizes of each and let what's actually on the water pick the fly.

The read: Give it a day or two to drop and clear after any rain, then lengthen your leader and get the fly down to where they're holding. Water temperature matters more than the calendar in August — if it climbs into the high 60s, give the trout a rest and come back when it cools. Always confirm the current MassWildlife regulations before you go.

Compiled from the USGS gauge at Squannacook, West Groton and regional hatch timing — a read on the water, not a substitute for your own eyes on it.

— Homewater Fly Co.

Conditions & Access

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Season & hatches

The Nissitissit, month by month

A month-by-month hatch calendar for this water — the bugs that matter and the flies that match them. Sizes are typical ranges; go smaller in clear, low water.

Month What's hatching / conditions Go-to flies
January Cold and low; a careful nymph through the deeper runs on mild days. Midge, Pheasant Tail, Perdigon
February Late winter; wild fish hold deep — small nymphs and midges. Midge, Hare's Ear, Perdigon
March Water rising and cold; early BWOs and little black stones. BWO, small stonefly, Pheasant Tail
April Spring wakes the stream — Hendricksons, caddis, and eager wild trout. Hendrickson, Elk Hair Caddis, Hare's Ear, BWO
May Best of the hatches — caddis, March Browns, and evening Sulphurs. Elk Hair Caddis, March Brown, Sulphur, Pheasant Tail
June Hatches fade into terrestrial season; fish tight to cover. Sulphur, Elk Hair Caddis, Foam Beetle, Ant
July Low, clear, and technical — terrestrials tight to the bank and tiny dries. Foam Beetle, Ant, Parachute Adams, Elk Hair Caddis
August This month The most technical water of the year — long leaders, ants, beetles, a low profile. Foam Beetle, Ant, Parachute Adams, Griffith's Gnat
September Cooling and reviving; terrestrials plus returning BWOs on grey days. Foam Beetle, BWO, Parachute Adams, Pheasant Tail
October Wild browns coloring up for the spawn; BWOs and small streamers. BWO, Woolly Bugger, Pheasant Tail, Midge
November Protect the spawners; a careful nymph for holdovers on mild days. Pheasant Tail, Midge, Perdigon
December Cold and quiet; deep nymphing through the slow runs. Midge, Perdigon, Pheasant Tail

Hatch timing shifts with the season and the weather — watch the water, not the calendar. Compiled from regional hatch data and local reports.

Know the fishery

  • Wild or stocked

    Wild brown and brook trout — a fragile, protected small-stream fishery.

  • The rig

    A long 12 ft leader to 5X–6X for the small, clear water.

  • Release

    Catch-and-release for wild trout; barbless, wet hands, quick release.

The box for this water

The Nissitissit Box

The proven patterns for the Nissitissit, curated into one box — the confidence flies and the ones that match this water's hatches, hand-tied and ready to fish in a Day Tripper fly box. Buy the box and save versus picking them one at a time.

$65.03$70.687 patterns · in a Day Tripper fly box

Save $5.65 vs. buying à la carte

Curated for the Nissitissit. Hand-tied flies, shipped direct.

What's in the box

  • Foam BeetleSize 14 · 3-packA terrestrial for tight-to-the-bank fish in the heat.
  • Parachute AdamsSize 14 · 3-packThe everywhere mayfly dry.
  • Elk Hair CaddisSize 14 · 3-packThe searching summer dry — riffles and pocket water.
  • Pheasant TailSize 10 · 3-packThe year-round confidence nymph.
  • Hare's EarSize 16 · 3-packThe buggy all-purpose searching nymph.
  • Flying AntSize 12 · 3-packA summer terrestrial fish key on.
  • Zebra MidgeSize 20 · 3-packCold-water and tailwater staple, fished deep.
  • Day Tripper Trout Fly Box The box Your flies arrive ready to fish, in a real fly box.

The flies

Flies That Fish Here

The flies we'd carry for the Battenkill right now — one pattern per card, pick your hook size.