Trout Species in California: Rainbows, Browns, Brookies, and Goldens

California's trout fisheries run from urban park lakes at sea level to granite-rimmed lakes above 11,000 feet. Rainbow trout get the most attention because they receive the most plants, but brown, brook, and golden trout are present in specific waters and offer some of the state's most distinctive fishing. Knowing what you are holding matters for identification, regulations compliance, and choosing the right approach on the water.

Rainbow Trout

Scientific name: Oncorhynchus mykiss

Rainbow trout are the foundation of California's put-and-take trout fishery. CDFW and collaborating hatcheries stock hundreds of thousands of catchable rainbows each year into community fishing ponds, urban lakes, and mountain reservoirs from October through May in the lowlands and spring through fall at elevation.

Identification

Rainbows are distinguished by a pink to red lateral stripe running from gill plate to tail, most vivid on wild fish and noticeable even on freshly stocked hatchery fish. The back and upper sides are covered in small black spots. The spots continue onto the dorsal fin and tail. The belly is white to cream. Hatchery fish tend to have softer, paler coloring than their wild counterparts because they have not been exposed to a natural diet rich in carotenoids.

Size

Stocked catchable rainbows from CDFW plants typically run 8 to 12 inches and weigh 3/4 to 1 pound. Trophy trout plants at some waters include fish in the 2- to 5-pound range. Wild rainbows in rivers and streams with good forage can exceed 20 inches. High-elevation rainbows in alpine lakes rarely grow large due to short growing seasons and limited food.

Habitat and Range

Rainbows tolerate water temperatures from the low 40s up to about 65 degrees Fahrenheit before stress becomes significant. They are stocked throughout California wherever water temperatures support survival during the stocking window. This includes coastal streams, Central Valley canals, foothill reservoirs, and Sierra Nevada lakes and streams. They are the only trout species CDFW stocks at the statewide scale through the community fishing program.

Steelhead: Same Species, Different Life

Steelhead are rainbow trout that migrate from freshwater to the ocean and return to spawn. They are genetically the same species but develop differently because of the ocean feeding period. A steelhead returning from the Pacific will be chrome-bright, heavily muscled, and may weigh 8 to 15 pounds. Steelhead runs still enter several North Coast rivers including the Russian, Eel, Klamath, and Trinity. They are managed separately from resident rainbow trout and require checking current regulations before fishing.

Brown Trout

Scientific name: Salmo trutta

Brown trout are not native to California. They were introduced from European stock in the 1800s and have established wild populations in many cold-water streams and tailwaters. CDFW stocks browns in a limited set of waters, primarily in the Eastern Sierra, and some populations self-sustain through natural reproduction.

Identification

Brown trout have a golden to tawny brown body with dark brown or black spots on the back and sides. The key distinguishing mark is the presence of red or orange spots surrounded by pale blue or white halos on the flanks. The tail is only lightly spotted or clear in adults, which differentiates browns from rainbows and brookies whose tails are more heavily marked. The belly ranges from pale yellow to cream. Large male browns develop a hooked lower jaw called a kype during spawning season.

Size

Wild browns in California rivers grow significantly larger than typical stocked fish. In tailwater fisheries like the Upper Sacramento below Dunsmuir and Hat Creek, 15- to 20-inch fish are present. The Owens River below Crowley Lake holds browns that commonly reach 18 to 24 inches. Browns grow more slowly than rainbows but live longer and become substantially more difficult to catch as they age and focus on larger forage.

Habitat and Range

Brown trout tolerate warmer water than rainbows, remaining active up to about 70 degrees Fahrenheit. This thermal tolerance lets them persist in streams and tailwaters that would stress or kill rainbows in summer. Primary brown trout waters in California include Hat Creek, Fall River, the Upper Sacramento, the Owens River, Convict Creek, and portions of the Eastern Sierra's drainage system. Browns prefer cover: undercut banks, root wads, large boulders, and deep pools. They feed heavily on insects at the surface during hatches but become primarily piscivorous as they grow large.

Fishing Approach

Small brown trout respond to the same baits that catch planted rainbows: PowerBait, nightcrawlers, and small spinners. Fish above about 14 inches become significantly more selective. In tailwaters and spring creeks, fly fishing with dry flies, nymphs, and streamers is the primary approach. Large browns often feed most aggressively at dawn, dusk, and after dark. A 4-inch articulated streamer retrieved through a deep pool at last light produces more large browns than any midday presentation.

Brook Trout

Scientific name: Salvelinus fontinalis

Brook trout are technically a char rather than a true trout, related more closely to lake trout and Dolly Varden than to rainbows or browns. They were introduced across the Sierra Nevada in large numbers during the late 1800s and early 1900s. In many high-elevation lakes, brook trout established self-sustaining populations and have been there ever since.

Identification

Brook trout are among the most visually striking fish in California's freshwater. The back is covered in vermiculated markings: pale, worm-like wavy lines on a darker olive-green or gray background. The sides have red spots surrounded by blue halos, similar to browns, but the overall coloring is more vivid. The lower fins are orange to red with a distinctive black stripe followed by a white leading edge. This black-and-white fin trim is unique to brook trout and makes identification immediate. Spawning males turn deep orange or red on the belly.

Size

Sierra Nevada brook trout rarely grow large. Most populations average 6 to 9 inches, and fish above 12 inches are notable. In waters where brook trout have been established for decades without competition from other species, they often overpopulate and stunt, producing large numbers of small fish. A few select waters hold bigger brookies in the 12- to 16-inch range where forage is sufficient and population density is lower.

Habitat and Range

Brook trout thrive in the coldest, most oligotrophic high-elevation lakes in the Sierra Nevada, typically above 9,000 feet. They spawn in fall in small tributaries or lake margins with groundwater upwelling, which allows them to reproduce in lakes that lack inlet streams. This reproductive strategy made them highly successful at self-sustaining in remote alpine lakes. They are not stocked by CDFW at the statewide scale in most areas. Many high-elevation lake populations are legacy introductions that predate current management practices. Notably, CDFW has been evaluating and in some cases removing brook trout from certain high-elevation lakes to protect threatened mountain yellow-legged frog habitat, so regulations and access vary.

Fishing Approach

Brook trout are the most willing biters of any California trout species. They are opportunistic feeders that respond to small spinners (size 0 to 1 Panther Martins or Rooster Tails in gold or black), small flies, and natural baits like nightcrawlers fished on a tiny hook. At high elevation lakes in summer, brookies will often strike almost anything that lands near them. Light line (2- to 4-pound mono) and small hooks are the only requirements. Fishing a small fly in the surface film during late afternoon produces consistent takes in lakes with insect activity.

Golden Trout

Scientific name: Oncorhynchus mykiss aguabonita

The California golden trout is the state's official freshwater fish and one of the most visually striking trout in North America. It is a subspecies of rainbow trout native to the upper Kern River drainage and found nowhere else on Earth in its original wild form. Access to golden trout water requires significant physical commitment. These fish live at elevations typically above 10,000 feet in the southern Sierra Nevada, and most golden trout lakes are accessible only by multi-day pack trips.

Identification

Golden trout are immediately recognizable. The body is brilliant yellow to deep gold along the sides and belly. A vivid red or orange lateral stripe runs from gill plate to tail. The red coloring extends across the gill plates and onto the belly in spawning fish. The back and dorsal fin carry small black spots. The lower fins are orange to red-orange with a white leading edge. A row of dark parr marks runs along the lateral stripe, often visible even in adults. No other California trout combines this gold, red, and spotted pattern.

Size

Golden trout in their native high-elevation habitat average 6 to 10 inches. The growing season above 10,000 feet is short and food is limited, which keeps populations lean. In a handful of lakes with better productivity, golden trout reach 12 to 14 inches. Golden trout introduced into lower-elevation waters with rainbows will hybridize, producing offspring that lose the pure coloration of the original strain. Protecting the genetic integrity of pure golden trout populations is a management priority for CDFW.

Habitat and Range

Wild golden trout are found in the upper Kern River drainage and in high-elevation lakes in Tulare and Inyo counties where they have been transplanted via pack mule. The transplant program started in the early 1900s and placed goldens into hundreds of remote Sierra lakes. Key waters include Golden Trout Wilderness lakes and the South Fork Kern River above Templeton Meadows, but reaching most of these requires 8 to 20 miles of hiking or horseback access. CDFW and the U.S. Forest Service manage access jointly.

Fishing Approach

Golden trout feed on terrestrial insects, midges, small mayflies, and whatever else lands on the surface of these nutrient-poor alpine lakes. Small dry flies in sizes 16 to 20 are the most consistent producers. Tiny spinners (size 0, gold blade) work well for anglers without fly fishing equipment. The water at these elevations is gin-clear and fish are easily spooked. Approach the bank quietly, crouch to reduce your silhouette, and make a low, accurate cast. The fishing itself is not technically difficult. Getting there is the hard part.

For stocking schedules at Sierra Nevada trout lakes including the Mammoth area, June Lake Loop, and Bishop Creek, see the Sierra Nevada stocked trout lakes guide. For gear setup, baits, and first-lake recommendations for beginners, the beginner's guide to stocked trout fishing covers the basics.