Trout Species of Oregon

Most Western states hold one or two native trout. Oregon holds at least four, plus the anadromous rainbow form (steelhead) that accounts for some of the most famous fly fisheries in the country. The reason is geographic: Oregon stretches from the Pacific coast across the Cascades to the high desert and the Wallowa Mountains, and each region has its own native species. Coastal drainages have coastal cutthroat. The Cascade and Deschutes drainages have redband rainbows (a native form of O. mykiss). The Klamath Basin has its own redband subspecies. And the spring-fed and high-elevation cold-water systems hold federally protected bull trout.

For a fly angler this means species identification matters in a way it doesn’t in most Western states. Statewide rules are built around the difference between wild (intact adipose) and hatchery fish, and several species — bull trout, wild steelhead, wild salmon — are catch-and-release no matter where you are or what regulation poster you read.

Native — Deschutes, McKenzie, Metolius, Crooked, Klamath Basin

The Columbia River Redband Trout (Oncorhynchus mykiss gairdneri) is the native rainbow form east of the Cascade crest in Oregon. The Deschutes River’s famous “redsides” are this fish — wild, native rainbows that hold a deep red lateral stripe and a row of dusky purple parr marks even into adulthood. Redbands also occur in the Klamath Basin (with their own subspecies, O. mykiss newberrii), the John Day, the upper Owyhee, and the Wallowa system. West of the Cascade crest, the native rainbow form is the same species but typically called “rainbow” rather than “redside” — the McKenzie, Metolius, and Willamette tributaries hold genetically native populations of the same O. mykiss.

Native (anadromous form of rainbow) — Deschutes, North Umpqua, Rogue, Sandy, Clackamas, Grande Ronde, John Day

Steelhead (Oncorhynchus mykiss) are the same species as rainbow trout — but the fish that go to sea, grow large in the ocean, and return to spawn. Oregon’s steelhead fisheries are the centerpiece of West Coast fly fishing: the North Umpqua summer fly-only run, the lower Deschutes summer steelhead, the Rogue’s unique “half-pounders” (juvenile steelhead under 20 inches that return after a single summer at sea), the Sandy and Clackamas mixed summer/winter runs, and the fall steelhead of the Grande Ronde and John Day.

Native — Cascade rivers (McKenzie, Sandy, Clackamas), coastal drainages, sea-run on the lower coastal rivers

The Coastal Cutthroat (Oncorhynchus clarkii clarkii) is the native cutthroat subspecies of the Pacific slope from northern California through Alaska. Oregon holds them in two life-history forms: resident stream populations in Cascade and coastal headwaters, and the anadromous “sea-run” or “harvest trout” that drop to saltwater and return to coastal rivers in late summer and fall. Sea-run cutthroat fishing on rivers like the Sandy, Nehalem, and Alsea is a distinctive Oregon fishery — small anadromous fish (12–18 inches) returning to the lower river in late summer.

Native — Eastern Oregon: Wallowa, Grande Ronde, John Day headwaters

The Westslope Cutthroat (Oncorhynchus clarkii lewisi) is the native cutthroat subspecies of the upper Columbia drainage. In Oregon, you find them in the cold headwaters of the Grande Ronde, Wallowa, John Day, and other northeastern drainages. They are smaller and less well-known than the Yellowstone Cutthroat of Idaho and Wyoming or the coastal cutthroat of the Pacific slope, but they are the native trout of the inland northeastern drainages.

Native — Metolius, Wallowa, Salmon-side drainages of NE Oregon

Bull Trout (Salvelinus confluentus) are a native char — not a true trout — listed as threatened under the federal Endangered Species Act since 1998. They are top-tier predators that feed heavily on smaller fish, persist only in the coldest, cleanest water, and serve as a biological indicator of intact native ecosystems. In Oregon they occur in the spring-fed Metolius, the cold headwater systems of the Wallowa Mountains, and select reaches of the John Day system.

Non-native — Williamson, Sprague, Wood, Crooked, Fall, Metolius (some)

Brown trout were introduced to Oregon in the late 1800s and have established wild populations primarily in the Klamath Basin spring-fed systems and select Cascade waters. The Williamson River holds the largest browns in the state — 24- to 28-inch wild fish are documented annually, and the slow, clear, weeded spring channel selects for big, careful fish that demand precise presentations. The Wood, Sprague, Fall, and Crooked also hold wild brown populations of varying density.

Non-native — Hosmer Lake, Cascade alpine lakes, isolated headwater streams

Brook trout (Salvelinus fontinalis) are native char of eastern North America, introduced to Oregon’s Cascade alpine lakes and select streams as part of the early 20th century stocking push. The most famous Oregon brookie fishery is Hosmer Lake in the Cascade Lakes Highway corridor, which holds trophy-class brook trout in a fly-only catch-and-release stillwater setting. Note that Hosmer’s well-known Atlantic salmon program was discontinued in 2014–2015 — current management is brookies and Cranebow rainbows only.

Oregon’s native trout face the standard mix of pressures — hybridization with hatchery rainbows, competition from introduced browns and brookies, habitat loss to dams and warming water, and the long-term conservation impact of dewatered tributaries. The state’s wild fish release rule (intact adipose = release) and the federal protection of bull trout are the load-bearing conservation tools — both depend on accurate species ID by anglers in the field.

Oregon is one of the few states where you can fish four native trout species, plus the anadromous form of one of them, in a single state in a single year. Redside rainbows on the Deschutes in June. Coastal cutthroat on the McKenzie in July. Summer steelhead on the North Umpqua in August. Bull trout following your streamer on the Metolius in September. Trophy browns on the Williamson at dusk during the Hex hatch in July. Each fishery has its own techniques, its own seasons, and its own regulations — and that’s the appeal. Show up with a fly rod, the Combined Angling Tag, and the willingness to read the regs, and Oregon will hand you the deepest trout fishery on the West Coast.