Trout Species of California

California holds some of the most distinctive native trout in North America: the protected California Golden Trout (the state fish, native to a single Sierra drainage), the historically important McCloud River Redband Rainbow (the strain from which most of the world’s hatchery rainbows descend), the widespread Coastal Rainbow Trout and its sea-run form (steelhead), the largest of the cutthroat subspecies — Lahontan Cutthroat Trout, and introduced but now wild Brown Trout that dominate the Eastern Sierra tailwaters and spring creeks.

Why California Is Different

California spans more latitude and elevation than any single Western state, and trout evolved in isolation across its drainages. The Sierra Nevada walls off coastal drainages from interior basins; the Klamath, the Kern, and the McCloud each developed their own native lineages. Today some of these are icons (the California Golden, the McCloud Redband), some are recovering after near-extirpation (Lahontan Cutthroat in parts of the Truckee), and the most widespread “wild” trout in the state — the Brown Trout — is not native at all.

For a fly angler this means species ID matters. California Golden Trout occur naturally only in one drainage. The McCloud Redband is genetically distinct above its native barrier falls. Wild steelhead must be released statewide. Coho salmon are ESA-protected and illegal to target. Knowing which fish you are looking at is part of fishing in California.

California Golden Trout — The State Fish

Native — South Fork Kern River above Kern Falls (and a few high-Sierra tributaries)

The California Golden Trout (Oncorhynchus mykiss aguabonita) is the official California state fish, native exclusively to the South Fork Kern River drainage above Kern Falls and a handful of small high-Sierra tributaries within the Golden Trout Wilderness. They are not found naturally anywhere else in the world. Brilliantly colored with a golden-yellow body, red lateral stripe, and a row of dark parr marks along the flank, the California Golden is one of the most visually striking trout on Earth.

ID at a glance

Body colorBrilliant gold-yellow on the flanks, deepening to bright orange-red along the belly. The most colorful native trout in North America.

Lateral stripeBright crimson-red lateral stripe along the flank — vivid even in juveniles.

Parr marksDistinctive row of round dark parr marks along the lateral line, persisting into adulthood (unusual for an adult trout).

SpottingBlack spots concentrated on the dorsal fin, tail, and back, with sparser spotting on the body.

Typical size6–10 inches in the high-Sierra streams of their native range; rarely larger. Lake-dwelling planted Goldens elsewhere can reach 14″+.

Where to find them

Native populations exist only in the upper South Fork Kern drainage and Golden Trout Creek within Golden Trout Wilderness in the southern Sierra Nevada. Reaching them requires a wilderness backpacking trip — there is no roadside access to the native range. Goldens have also been planted in many high-Sierra lakes outside their native range; those are the same species but in introduced settings.

California Golden Trout are protected. Special regulations apply throughout Golden Trout Wilderness — verify current CDFW regs before fishing. Wilderness permits are required for overnight access. Handle with care: native populations are small, isolated, and vulnerable.

McCloud River Redband Rainbow

Native — Upper McCloud River above natural barrier falls

The McCloud River Redband Rainbow (Oncorhynchus mykiss stonei) is one of the most historically important trout in the world. Eggs from McCloud River fish were shipped to hatcheries across the United States and around the world starting in the 1870s — most of the world’s hatchery rainbow trout descend from this strain. The true native McCloud Redband persists in the wild trout section above a natural barrier falls, genetically distinct from downstream populations that have hybridized with hatchery stock.

ID at a glance

Lateral stripeDeep red to crimson lateral stripe — more pronounced than coastal rainbow strains.

Parr marksDusky purple parr marks visible along the flank into adulthood — a classic redband feature.

SpottingHeavy black spotting on the back, dorsal fin, and tail, often with light halo around larger spots.

BodyOlive to bronze back, silver flanks (in younger fish), strong square tail.

Typical size10–14 inches in the wild trout section; larger in lower reaches with hatchery introgression.

Where to find them

The genetically pure native population lives above a natural barrier falls in the upper McCloud River, accessible via the Ah-Di-Na to Lake McCloud trail. Below the falls, the river holds rainbows of mixed wild and hatchery ancestry. The wild trout section is fly-only and catch-and-release.

Coastal Rainbow Trout

Native — Coastal and Sierra-foothill drainages

The California Coastal Rainbow (Oncorhynchus mykiss irideus) is the dominant rainbow form in coastal rivers and Sierra-foothill streams. Genetically similar to coastal rainbows from Oregon north to Alaska, they hold the broad geographic range and adaptable habitat that makes the species the most widely distributed trout in North America. The sea-run anadromous form is the famous California steelhead.

ID at a glance

Lateral stripePink to red lateral stripe (less intense than redband strains).

SpottingBlack spots on back, dorsal, and tail — generally lighter than redband stocks.

BodyOlive to silver back, silver flanks, white belly. Strong square tail.

Typical size10–18 inches in resident populations; sea-run steelhead reach 5–15 lbs in California waters.

Steelhead — The Anadromous Rainbow

Native (anadromous form) — Trinity, Klamath, Russian, Eel, Smith, Sacramento system

California steelhead (Oncorhynchus mykiss) are the sea-run form of the rainbow — fish that go to the ocean, grow large, and return to freshwater to spawn. California’s steelhead fisheries are concentrated on the Trinity (the state’s top steelhead tailwater), the Klamath (now in recovery after the historic dam removals), the Russian River (winter run), and the Eel and Smith on the far north coast. Several California steelhead populations are ESA-listed.

ID at a glance

ColorationChrome silver in the ocean phase; spawning fish develop reddish lateral stripe and darker back.

SpottingHeavy black spotting on back, dorsal, and tail — much heavier than most resident rainbows.

SizeAdults typically 5–15 lbs in California; some populations average smaller (Russian River fish often 4–8 lbs).

Adipose finIntact (unclipped) on wild fish; clipped on hatchery fish — this is the legal distinction for harvest.

All wild steelhead (intact adipose fin) must be released statewide. California Steelhead Report Card required when fishing for steelhead — a separate document from the basic license. Some California steelhead populations are ESA-listed.

Lahontan Cutthroat Trout

Native — Truckee, Carson, and Walker drainages (East Sierra)

The Lahontan Cutthroat Trout (Oncorhynchus clarkii henshawi) is the largest of the cutthroat subspecies and the only cutthroat native to California. They evolved in the closed Lahontan Basin (now divided between California and Nevada), with native populations in the Truckee, Carson, and Walker drainages. Pyramid Lake (NV) holds the world-record-class strain; in California, restored populations exist in some Truckee River reaches.

ID at a glance

Throat slashBright red-orange “cutthroat” slash under the lower jaw — the diagnostic field tell for any cutthroat.

SpottingHeavy uniform black spotting across the entire body, including the head — denser than other cutthroat subspecies.

BodyOlive to bronze back, with a yellowish to coppery flank tone. Lateral stripe muted compared to rainbow strains.

Typical size12–18 inches in stream populations; lake-dwelling strains historically reached 20+ pounds (Pyramid Lake).

Brown Trout — Introduced but Naturalized

Non-native — Owens, East Walker, Hot Creek, Truckee, Trinity, Pit

Brown Trout (Salmo trutta) are not native to California — they were introduced from European stock starting in the late 1800s. They have naturalized in cold tailwaters and spring creeks across the state, and many of California’s most famous trophy fisheries (the East Walker, the Owens, the lower Pit) are dominated by large wild browns.

ID at a glance

SpottingBlack and red spots on the back and flanks, often with pale halos around the spots — diagnostic for brown trout.

BodyButtery yellow-brown to olive-bronze, with red and black spots. Square tail (no fork).

ThroatNo red slash (distinguishes from cutthroat). White-yellow throat.

Typical size12–18 inches in most California trout water; trophy class 20–26 inches in the East Walker, Owens, and lower Pit.

Field Reference Table

Species	Status	Field tell	Where
California Golden Trout	Native (state fish)	Brilliant gold body, red lateral stripe, dark parr marks even in adults	South Fork Kern above Kern Falls, Golden Trout Wilderness only
McCloud River Redband	Native	Deep red lateral stripe; purple parr marks; heavy spotting	Upper McCloud River above natural barrier falls
Coastal Rainbow Trout	Native	Pink-red lateral stripe; lighter spotting than redband	Coastal and Sierra-foothill drainages statewide
Steelhead	Native (anadromous)	Chrome silver fresh from the ocean; heavy black spotting; large size	Trinity, Klamath, Russian, Eel, Smith, Sacramento system
Lahontan Cutthroat	Native	Red-orange throat slash; heavy uniform spotting including head	Truckee, Carson, Walker drainages (East Sierra)
Brown Trout	Non-native	Halo spots, square tail, no throat slash	Owens, East Walker, Hot Creek, Truckee, Trinity, Pit

Know the fish, then check the water.

California River Conditions →California Fishing Regulations