Brook Trout Fishing Guide
Freshwater · Water temp 46–65°F (ideal 58°F)
Quick Facts
- Actually a
- Char, alongside lake trout and Arctic char, not a true trout
- Identifying marks
- Pale worm-like vermiculations on a dark back; white leading edge and black stripe on the lower fins
- State fish of
- Nine states, more than any other fish, including New York, New Hampshire, Vermont, Pennsylvania, West Virginia, Virginia, North Carolina, New Jersey and Michigan
- Typical size
- 6-10 inches in headwater streams; Maine and Labrador ponds produce fish over 3 lb
- Range
- Native to the East from Georgia to Maine and west to the upper Midwest; widely naturalised in the Rockies
- Spawning
- Autumn, on gravel, at 40 to 55 degrees
- Tackle
- 2 to 4 weight fly rod, 6-7 ft on small streams, 5X to 6X tippet
Overview
Brook trout are the native trout of eastern North America and the most-honoured fish in the country, holding the state fish designation in nine states, more than any other species. They are also not a trout. Brook trout are char, in the same genus as lake trout and Arctic char, which is why they spawn in autumn rather than spring and why the markings run the other way round from a true trout: pale vermiculations on a dark back rather than dark spots on a pale one. The white-edged fins with the black stripe behind are the giveaway no other eastern fish has.
Brook trout hold from about 46 to 65 degrees Fahrenheit, with an ideal near 58 degrees. Those numbers usually surprise people, because brook trout have a reputation as the coldest-water trout and the reputation implies a colder preference than they actually have. The best available compilation of laboratory work puts their growth optimum between 13 and 16 degrees Celsius and their preferred temperature near 15, which is at or slightly above where rainbow trout and cutthroat sit. What is genuinely lower is the ceiling. Brook trout stop growing above 20 degrees Celsius, a much harder limit than the temperature at which rainbow trout are merely uncomfortable.
The distinction matters on the water. Brook trout live in the coldest headwaters of their range because they are excluded from everywhere else, not because they went looking for 45-degree water. Where brown and rainbow trout have been introduced into eastern rivers, brook trout have retreated upstream into the small, shaded, spring-fed water above where the competition can follow. That is why brook trout fishing in the East means small streams, and why the fish are usually small: a headwater stream cold enough to keep the competition out is also too poor in food to grow anything large. The exceptions, the ponds of northern Maine and the rivers of Labrador, are the places anglers travel for.
Optimal Conditions
| water Temp | 46-65°F, ideal 58°F |
| air Temp | 35-72°F |
| wind | 0-10 mph ideal, tolerate up to 18 mph; small streams fish best with little wind |
| pressure | Moderate sensitivity; recovers quickly, within half a day |
| light | Low. Dawn is the strongest window and the night bite is negligible |
| best Seasons | Autumn pre-spawn (September), then late spring (May-June) |
Seasonal Patterns
spring
A strong stretch. Snowmelt and rain keep headwater streams cold and full, insects come off through May and June, and brook trout feed freely in water that is comfortably inside their range. This is the easiest time of year to find them, because they have not yet been forced into thermal refuges and are spread through the water rather than stacked in it.
summer
The hard season, and the one where knowing the ceiling pays. As streams push toward the mid 60s brook trout abandon open water and concentrate around spring seeps, plunge pools, undercut banks and the mouths of cold tributaries, sometimes in remarkable densities. Fish early, fish the shade, and treat any cold input as the spot rather than a spot. Above 65 degrees they are under real stress and are best left alone.
fall
September is the peak. Fish colour up ahead of the spawn, males turn brilliant orange with white-edged fins, and pre-spawn aggression makes this the biggest seasonal lift we apply to the species, bigger than its own late-summer feed. Cooling water pulls them out of summer refuges and back into the main flow. By October and November they are on gravel and spawning, and many waters are closed for it, which is both a courtesy and usually the law.
winter
Activity falls off below 40 degrees. Brook trout hold in slow deep pools and feed sparingly on midges during the warmest part of the afternoon. Most of their native range is closed to fishing through the winter, and where it is open the fish are recovering from the spawn. This is the quietest quarter of their year.
Best Times to Fish
dawn
The strongest window. Brook trout feed hardest in the first hours of light, and in summer this is often the only stretch of the day when a small stream is inside their temperature range at all. On heavily fished water it is also the only time the fish have not already been walked past.
midday
Better than it is for most trout, because so much brook trout water is cold, shaded and small enough that midday warming helps rather than hurts. In spring and autumn the middle of the day is genuinely productive. In high summer it is the stretch to avoid on any stream without heavy canopy.
dusk
A solid second window, close behind dawn. Evening hatches on small streams bring fish up freely, and the fading light makes them bolder in the thin water where they are otherwise hard to approach without spooking.
night
Effectively no fishery, and this is where brook trout part company with the brown trout that often share their rivers. Browns develop a strong nocturnal habit as they grow; brook trout do not. Most brook trout water is also closed at night.
solunar
Moderate solunar sensitivity, and on a small stream it is swamped by hatch timing, water temperature and flow. Useful at the margin on ponds and lakes, where brook trout behave more like open-water fish and cruising activity tracks feeding periods more closely.
Weather Response
Brook trout handle fronts better than most species here and recover inside half a day. Their water is small and responds fast to air temperature, so the practical effect of a cold snap is a stream that takes longer to reach its feeding range. Start later rather than earlier the morning after a front.
Good in spring and autumn, when warming lifts a cold stream toward the range where insects hatch. The exception is high summer, when a warm front on a stream already running in the low 60s pushes it past the ceiling and concentrates fish in whatever cold water remains.
Settled weather produces predictable small-stream fishing, with fish holding where you expect and feeding on a regular schedule. Long dry spells are the risk rather than the pressure: headwater streams drop and clear fast, and low clear water makes approach far more important than fly selection.
Rain is more welcome here than for almost any other species in this guide. It raises and colours thin summer streams, cools them, washes terrestrials in, and gives fish enough cover to feed without being spooked by every shadow on the bank. A day or two after summer rain is the best small-stream brook trout fishing there is.
Proven Techniques
Small Dry Flies
Brook trout in headwater streams are famously willing, and a size 14 or 16 attractor dry such as an Adams, Royal Wulff or elk hair caddis will move fish that have never seen an artificial. Presentation beats pattern by a wide margin here. The fish are not selective; they are just very easy to spook in thin clear water.
Dry-Dropper in Pocket Water
A buoyant dry with a small beadhead nymph a foot or two below covers the plunge pools and pocket water that hold brook trout through summer. Work upstream, cast short, and take one or two fish from each pocket before moving on. The most efficient way to fish a small mountain stream.
Small Spinners
An eighth-ounce inline spinner in gold or silver is deadly on brook trout and is often the better choice on brushy streams where a fly cast is impossible. Cast upstream and retrieve just faster than the current. The single most effective method for anglers who are not fly fishing.
Worm on a Light Rig
The traditional method across the Appalachians and northern New England, and still one of the best. A single split shot and a garden worm drifted into pool heads and under cut banks takes fish that will not move for anything else, particularly in high or coloured spring water. Worth knowing that brook trout swallow bait deeply, so it suits a keeping trip rather than catch and release.
Pond and Lake Trolling
The large brook trout of northern Maine, the Adirondack ponds and Labrador come to trolled streamers and small spoons in the weeks just after ice-out, when fish are cruising shallow before the water stratifies. Grey ghost and other classic New England streamer patterns were designed for exactly this.
Brook Trout vs Brown Trout
These two share eastern rivers everywhere brown trout were introduced, and the introduction is why brook trout are where they are. They divide the water, and the day, between them.
| Brook Trout | Brown Trout | |
|---|---|---|
| Family | Char, native to eastern North America | True trout, introduced from Europe in the 1880s |
| Markings | Pale vermiculations on dark; white-edged fins | Dark and red spots on pale; no white fin edge |
| Best time of day | Dawn, with a negligible night bite | Dusk and after dark, increasingly so as they grow |
| Upper limit | Stops growing in the mid 60s | Tolerates several degrees more, which is how it took the lower rivers |
| Where you find them | Cold headwaters above the competition | Main-stem rivers and the warmer water downstream |
| Wariness | Willing and unselective, but spooks easily in thin water | Selective and genuinely difficult once large |
Chasing the other one? Read the brown trout guide.
Brook Trout Fishing Questions
Is a brook trout actually a trout?
No. Brook trout are char, in the genus Salvelinus alongside lake trout, bull trout and Arctic char, rather than in the genus that holds brown, rainbow and cutthroat trout. Two practical consequences follow. They spawn in autumn rather than spring, like the other char and like brown trout, which means autumn is both their best fishing and the season most of their water is closed. And their markings run the opposite way from a true trout: pale worm-like vermiculations on a dark back, rather than dark spots on a pale one, with white-edged lower fins no other eastern fish has.
What water temperature is best for brook trout?
Around 58 degrees Fahrenheit, in a band from roughly 46 to 65. That is warmer than most anglers expect, because brook trout have a reputation as the coldest-water trout that implies a colder preference than they actually have. Laboratory work puts their growth optimum between 13 and 16 degrees Celsius and their preferred temperature near 15, at or slightly above rainbow trout. What is genuinely lower is the ceiling: they stop growing above 20 degrees Celsius, roughly 68 Fahrenheit, which is a much harder limit than the point at which rainbow trout merely become uncomfortable.
Why are brook trout only found in small headwater streams?
Competition, not preference. Brook trout once occupied whole eastern river systems from the headwaters to the sea. Brown trout arrived from Europe in the 1880s and rainbow trout from the West around the same time, and both tolerate several degrees more warmth. As eastern rivers warmed through logging, dam-building and agriculture, the introduced species took the lower and middle reaches and brook trout retreated upstream into water too cold for the competition to follow. Their small average size is a consequence of that: a stream cold enough to exclude brown trout is also too poor in food to grow a large fish.
What is the best time of day to catch brook trout?
Dawn, with dusk close behind. In summer the first hours of light are frequently the only stretch of the day when a small stream sits inside the brook trout temperature range at all, so the window is not merely better, it can be the whole day. Midday is more productive than it is for other trout, because so much brook trout water is shaded and cold enough that warming helps. Night is effectively no fishery, which is where they differ sharply from the brown trout often sharing the same river.
When do brook trout spawn?
In autumn, generally October and November, on gravel in water between about 40 and 55 degrees Fahrenheit. Males colour up dramatically beforehand, turning deep orange along the belly with the white fin edges standing out against it, and September pre-spawn aggression makes it the best fishing of the year. By the time fish are actually on gravel, most of their native range is closed to angling, which is both the law in most states and worth respecting where it is not. This is the opposite of rainbow and cutthroat trout, which spawn in spring.
Are brook trout in the Rocky Mountains native?
No. Brook trout were stocked across the West beginning in the late 1800s and are now among the most abundant fish in high-elevation Rocky Mountain streams, often in far greater numbers than in their native East. In the West they are the invasive species rather than the native one, and they compete directly with cutthroat trout for the same cold headwater habitat, which is why many western states encourage anglers to keep them. A Colorado or Montana angler can absolutely target brook trout, and in many drainages will catch them whether targeting them or not.
Best Months for Brook Trout
These are the months our scoring lifts brook trout activity for pre-spawn or autumn feeding. Open one for that month's calendar.
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