Trout: The Fish, Where They Live, When They Bite and How to Catch Them

Trout are cold-water fish of the salmon family, and about a dozen of them make up nearly every trout an American angler catches. The spots sort them at a glance: dark spots on a light body is a true trout, light spots on a dark body is a char. Two of the most famous, the brook trout and the lake trout, are chars. The stream trout feed best in water of 55–65 °F (13–18 °C); lake trout want it ten degrees colder. That one reading decides where, when and how you fish for them.

A rainbow trout is closer kin to a Chinook salmon than to a brook trout. The “trout” everyone learns first is two different branches of the salmon family.

Start here

• Trout fishing: the season, the water and the one outfit to buy, for stocked and wild fish.
• Rainbow trout: the most stocked trout on the continent and the one most anglers catch first. How to catch them by water and season: rainbow trout fishing.
• Brown trout: the European import of 1883 that grows biggest in American rivers.
• Brook trout: the native char of the East, and why its spots are pale.
• Trout water temperature: the 68 °F line and what to do when a river reaches it.

What is a trout, exactly?

Trout is a common name, not a branch of the family tree. Every fish called a trout belongs to the salmon family, Salmonidae, in one of three groups. The Pacific trout (rainbow, cutthroat, golden, Apache, Gila) share the genus Oncorhynchus with the Pacific salmon. The brown trout shares Salmo with the Atlantic salmon. The chars, Salvelinus, include the brook trout and the lake trout, and the Arctic char of Alaska’s lakes and Maine’s remote ponds.

That is why a rainbow sits closer to a Chinook than to a brookie. In 1989 the rainbow and the cutthroat were moved out of Salmo and into Oncorhynchus, the Pacific salmon’s genus. Trout vs salmon in one line: most Pacific salmon die after one spawn, a steelhead can spawn again, and at the fish counter trout is the leaner fish.

Are trout freshwater or saltwater fish?

Most trout live their whole lives in fresh water: streams, rivers, lakes and ponds. A few forms go to sea and come back to spawn, which makes them anadromous. The steelhead is a rainbow that went to sea or to a Great Lake. The sea trout of Europe is a brown trout that went to salt water, not a separate species.

Unlike most Pacific salmon, a steelhead does not have to die after spawning. NOAA Fisheries calls it iteroparous: it can spawn more than once.

Do trout have scales?

Yes. On a brook trout they are so small that the fish feels soft to the touch. Iowa’s biologists count about 230 scales along its lateral line, set deeper in the skin than a brown trout’s.

Free PDF · Water temperature chart When do trout bite?

One reading, and the 16-page chart shows which of 26 fish are spawning, feeding hard or slowing down; for bass, crappie, bluegill and walleye, where they sit and what to throw. Every number sourced.

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Which trout is it?

Spots are the first sort. After that, one mark per fish does the work. The eleven below cover nearly every catch. Count the rare Western natives, the other chars and the hybrids and there are 21 types of trout; the bull trout of the Northwest and the Dolly Varden of Alaska are chars too.

Brook trout, a char: pale marks on a dark body, the reverse of the rainbow at the top of the page. Illustration: Duane Raver, U.S. Fish and Wildlife Service (public domain).

The table settles most fish in three questions. Is the tail deeply forked? Lake trout. Is there a red slash under the jaw? Cutthroat. Are the spots pale on a dark body? A char, so a brook trout or a splake. Everything left is a rainbow or a brown, and the tail decides it: spotted all over is a rainbow, nearly bare is a brown.

Two name traps catch almost everyone. The golden trout of California is a wild native. The bright yellow “palomino” or golden rainbow in stocked water is a color strain, bred from a yellow fingerling found in a West Virginia hatchery in 1955. On the West Coast a gold rainbow from a California farm is sold as the lightning trout, a strain of its own. And the “speckled trout” of the Gulf Coast is a seatrout, a saltwater drum, not a trout.

What other names do trout go by?

The brown trout is still called the German brown by many anglers, because the first eggs came from Germany in 1883. The brook trout is a brookie, and the lake trout a laker, or a togue in Maine.

Where do trout live?

Trout need cold, clean water with plenty of oxygen, and the map follows that. Trout Unlimited’s 2015 State of the Trout report counts trout as native to 38 of the 50 states. Stocking has carried them far beyond that, into ponds, reservoirs and the cold rivers below deep dams.

Each species has its own home range:

• Rainbow trout are native only to the Pacific slope, from Alaska to the California–Mexico border, and have been stocked far beyond it.
• Brown trout came from Europe in 1883 and now hold the bigger, warmer rivers that brook trout lost.
• Brook trout are native to eastern North America, from northern Georgia to Nova Scotia.
• Cutthroat, golden, Apache and Gila trout are the native trout of the West and the Southwest.
• Lake trout live in the deep lakes of Alaska, Canada, the Great Lakes and the Northeast.

In a stream, trout hold where the current brings food past a resting spot. In a lake they cruise, and in summer they follow the cold water down. Lake trout go deepest: most live in lakes more than 50 ft (15 m) deep, and the U.S. Fish & Wildlife Service has found them well over 200 ft (61 m) down.

The native trout are the fragile ones. Of 28 native trout species and subspecies, Trout Unlimited’s 2015 report counted three extinct and six listed as threatened or endangered. One has come back since: in September 2024 the Apache trout became the first sport fish taken off the endangered species list for recovery.

How warm is too warm for trout?

The stream trout feed best in water of 55–65 °F (13–18 °C) and start to stress above 68 °F (20 °C). Brook trout and lake trout draw the line lower, and each species spawns at its own temperature and season:

Brook trout are the most sensitive. West Virginia’s biologists call water above 65 °F for extended periods a stress factor. Browns hold on longest, which is part of why they took over rivers that brook trout lost.

Catch and release asks for a lower line still. Keep Fish Wet’s review of the release studies puts it at about 61 °F (16 °C) for rainbow, brook and cutthroat trout, and about 66 °F (19 °C) for browns. Above that, a trout that swims away can still die of the fight.

A stream thermometer is the most useful piece of trout tackle you can carry. Take the reading in the current, at dawn and again in the afternoon, and quit when it touches 68 °F. When you do release a fish, how to hold a trout keeps it in the water and swimming. The trout water temperature chart gives what to throw at every reading, in rising and in falling water.

When does each trout spawn?

The seasons follow one split: rainbow and cutthroat trout spawn in late winter and spring, brown, brook and lake trout in fall. The lake trout is the exception to the gravel. It spawns over boulder beds in the lake itself, where currents keep the rocks clean of silt.

Each species is shallow, aggressive and easiest to find in the weeks around its spawn, and easiest to harm then too. The female digs a redd, a nest of clean, fanned gravel, usually in a riffle or the tail of a pool. Wading through one crushes the eggs, so step around the pale patches and fish below them, never over them.

When is the best time to fish for trout?

Spring and fall, for most water. Oregon’s wildlife agency names both as the best seasons for rivers and streams and for low-elevation lakes. The year runs like this:

• Late winter and spring: stocking starts. In Pennsylvania the trucks rolled from the week of February 16, 2026, for an April 4 opener. Wild streams fish well as the water climbs through the 50s.
• Summer: fish at dawn and dusk, and move to water that stays cold: tailwaters below deep dams, spring creeks, high-elevation streams and lakes. In lakes, go deeper.
• Fall: the water cools and trout feed in daylight again. Browns turn territorial before their spawn and hit streamers behind boulders and log jams.
• Winter: small baits and flies, fished slowly in slow, deep water. Tailwaters stay fishable all year.

Through the day, the same thermometer rules. In summer the bite is at first and last light; in winter it is late morning to mid-afternoon, the warmest hours. Big browns keep their own clock: West Virginia’s biologists note that the larger fish become more nocturnal, which is why the biggest are caught at dusk and after dark.

How do you catch trout in a stream?

Read the water first. A stream trout holds still and lets the current bring its food. Oregon’s guide puts them in slower water behind rocks, along steep or undercut banks and in deeper, slower pools. The places to try, in order:

• Riffles, the shallow, broken water over stones. Trout move up into them as the water warms.
• Runs, the deeper, smoother water below a riffle.
• Seams, the line where fast water meets slow. Trout sit on the slow side and feed from the fast side.
• Pocket water, the calm cushion in front of and behind a boulder or a log.
• Pools and tailouts, the deep slow water and the shallow lip at its lower end.

Then keep out of sight. Leland’s trout guides work downstream when they fish for stocked trout and upstream for wild ones. A wild trout faces into the current, so working upstream keeps you behind it. Stay low, keep your shadow off the water and stand back from the bank.

Then go light. The same guides point out that 6 lb line drags a small lure through the current far less naturally than 2 lb line. Both have landed trout over 10 lb on 2 lb test.

Three ways cover most stream trout:

1. A small spinner or spoon, cast upstream and across and brought back just fast enough to turn the blade. It covers water fastest; the trout lures guide sets out the sizes and colors.
2. A drifted bait: a worm or a small artificial bait with enough split shot to tick within a few inches of the bottom, Oregon’s drift rig. Many wild-trout stretches ban trout bait, so read the rules for the water first.
3. A fly: nymphs under an indicator most of the year, dry flies when a hatch is on. How to fly fish for trout starts with a 9 ft 5-weight and a few trout flies. Tom Rosenbauer’s essentials at Orvis include a Parachute Adams, a Pheasant Tail, a Gold Bead Hare’s Ear and a Bead Head Woolly Bugger.

On small, brushy streams, Wired2Fish suggests an ultralight spinning rod of 4 ft 6 in to 6 ft; bigger rivers take rods of 7–12 ft. For steelhead, float rods of 9–14 ft drift spawn sacs under a float, the method steelhead fishing builds on.

How do you catch trout in a lake or pond?

From shore, with one of two rigs. In still water trout cruise instead of holding. Oregon’s guide sends you to weed beds, to the logs and rocks around a stream inlet, and to deeper water in summer. Both rigs are cast from the bank.

• The bobber rig: a small sinker just above the hook and a bobber 1½–3 ft (0.5–0.9 m) above it, with a worm or a dough bait hanging below.
• The bottom rig: the sinker about 1½ ft (0.5 m) above the hook, cast out and left. A floating bait such as PowerBait rises off the bottom and hovers about 1½ ft up, in front of cruising fish.

For stocked lakes and ponds the Trout Magnet, a 1/64 oz jig under a float, is the other standard.

Lake trout are a different game. They follow the 42–52 °F water down below the thermocline in summer, which means trolling on downriggers or a 1/2–1 oz jig dropped onto fish on the sonar. From late summer they move shallow to feed before the fall spawn, and through the ice they take tip-ups and jigs. For most of the year, lake trout fishing is a depth game played from a boat with sonar.

What gear do you need for trout?

One light outfit covers the first season. Oregon’s beginner list is a lightweight 6 ft (1.8 m) spinning or spincasting rod with a matching reel and 4–6 lb monofilament. Add a few spinners, size 8 bait hooks, red-and-white bobbers, PowerBait, #5 split shot and worms. The hook for every bait is on the hook size chart.

The fly version is Oregon’s too: a 9 ft (2.7 m) 5-weight with a weight-forward line and 4X–5X tippet. Trout fishing for beginners has a table for every kind of trout water, and the line and rods hubs explain the choices behind it.

Stocked or wild?

Most anglers catch their first trout from a hatchery truck. Pennsylvania’s 2026 program alone planned about 3.2 million adult trout for 684 streams and 130 lakes. About three quarters were rainbows, and the fish averaged 11 in and 0.58 lb. Oregon stocks more than 7 million trout a year in its lakes, ponds and reservoirs.

A stocker grew up on pellets, which is why it takes dough baits and bright spinners in the first weeks after the truck. Leland’s guides describe where it goes next. A rainbow runs downstream after the plant and looks for the deep water below a run. A brook trout runs downstream too, but holds in shallower water at the head of a run.

Your state wildlife agency’s stocking schedule is the first map to check. Go in the first days or weeks after a truck visit, while the new fish are still schooled and naive. Most stocked water is put-and-take: the fish are there to be kept.

A wild trout was born in the stream. It is warier, spooks at a shadow and is far more selective about what drifts past it. The trout fishing guide covers how to fish for each.

Do you need a license to fish for trout?

Yes, a state fishing license, and in some states more. Pennsylvania requires a trout permit on top of the license to fish for trout, or to fish its special-regulation and Class A wild trout waters. Anglers under 16 are exempt there.

Trout rules can change from one stretch of stream to the next. Expect bait bans, artificial-lures-only and fly-only water, single barbless hooks, size and bag limits, and seasons that close for the fall spawn. Read the regulations for the water you fish, not only the state’s general rules.

A “Class A” stream is Pennsylvania’s label for its best wild trout water, set by the weight of wild trout per acre. A brown trout stream qualifies at 40 kg per hectare, 35.6 lb per acre; a brook trout stream at 30 kg, 26.7 lb per acre. Those streams are managed for wild trout, with stocking only in limited cases.

What do trout eat?

Insects first, fish later. West Virginia’s biologists list stoneflies, mayflies and caddisflies as the brook trout’s food all year, with grasshoppers, beetles and salamanders added in summer. Mature brown trout turn to eating fish, which is why a big brown takes a big streamer or a minnow lure. Adult lake trout, in the U.S. Fish & Wildlife Service’s words, “prefer to eat fish.”

That diet is the case for small lures and flies, drifted the way food drifts: with the current. What trout eat changes month by month, and the fly or lure that works is the one that looks like this month’s food.

Are trout good to eat?

Yes, and they are among the safest fish to eat often. The FDA lists “Trout, freshwater” among its Best Choices, the lowest-mercury group. It carries omega-3s too: USDA figures give farmed rainbow trout 0.73 g of EPA and DHA per 100 g, wild rainbow 0.59 g. For fish you catch yourself, check the state advisory for that water first.

The meat is mild, with a delicate texture, and runs from white to pink or orange depending on the diet. Trout is leaner than salmon. USDA figures give wild rainbow trout 3.5 g of fat per 100 g (3.5 oz) and farmed rainbow 6.2 g, against 13.4 g for farmed Atlantic salmon. Stocked trout are meant for the pan; many anglers release the wild ones.

How big do trout get?

A typical trout is measured in inches and a record one in pounds. The records below are the IGFA all-tackle marks.

A steelhead dwarfs a stream rainbow of the same species: Washington’s returning steelhead average 8–11 lb. A stocked Pennsylvania trout, at 11 in and just over half a pound, is the fish most anglers measure everything else against.

Two of the records come with a story. The rainbow is a sterile triploid, a fish from an escaped net pen that never spent energy on spawning and kept growing. The brook trout’s 1915 record from the Nipigon River is the oldest of them all.

For the small hooks trout ask for, the hooks hub covers the sizes and styles.

Free PDF · 16 pages

Stop guessing. Know what's biting before your first cast

A whole Saturday on the water with nothing to show for it. One reading tells you who's feeding.

The Water Temperature Fishing Chart. Take one water temperature reading, find it on the chart, and see which of 26 freshwater fish are spawning, feeding hard or slowing down.

• Where bass, crappie, bluegill and walleye sit, and what to throw. Trout: the reading where you stop.
• Why a 3 ft drop beats a cold front, and what to throw each day of the front
• The three thermometer mistakes that make a reading lie

The chart's numbers come from state fish and wildlife agencies and fisheries research: 61 sources, each listed on the site.

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No card, nothing to buy. Confirm with one click and the PDF is on its way, one version for your phone and one to print, yours to keep. Then a few short emails and one a week on what's biting, with an unsubscribe link in every one. Privacy.