Troutline

Selway River

Idaho·North-Central Idaho·46.09° N, 115.51° W
Flow
1,900 CFS
Selway River near Lowell
Water Temp
—
Condition
Below Normal
Weather
71°F
Mostly Clear
near Elk City

Insights

Wind
Wind 2 mph — calm
Easy casting and clean surface presentations.
Flow
Low flows at 1,900 CFS
Fish are spooky. Lighten tippet and lengthen leaders.
Pressure
Pressure rising
Feeding may slow as fish sit tight.
Snowpack
Snowpack snowpack update
Snowpack data for Selway River basin is limited right now.

The Selway is a 100-mile freestone that drains the heart of the Selway-Bitterroot Wilderness and runs almost entirely without a road beside it. Below Selway Falls, a single gravel track — Forest Road 223 — traces the lowest 21 miles from Lowell up to the falls, and that is the only water you can reach with a truck. Everything above the falls is 47 miles of Class III-IV whitewater from Paradise down to Race Creek, permit-only, and the float lottery is one of the hardest to draw in the Lower 48 (roughly 62 launches a year against thousands of applicants). What you are fishing for is wild westslope cutthroat — one of the most intact native populations left in America, commonly 12 to 16 inches with better fish pushing 16 to 20. A few rainbows, cutbow hybrids, mountain whitefish, and protected bull trout mix in, but this is a cutthroat river through and through.

It fishes like a big pocket-water freestone with a short, sharp season. The river blows out hard on snowmelt every spring and does not drop into shape until mid-to-late June, then fishes best through the heat of mid-summer as flows fall and cutthroat slide into classic summer holding water. These are eager, dry-fly-happy fish — a Stimulator, a big Humpy, a hopper, or a bushy caddis in sizes 8 to 14 covers most of the season, and the salmonfly and golden stone emergence from June into July is the marquee event. Everything is catch-and-release with single barbless hooks on the mainstem and its tributaries, so you are not keeping fish; you are there for wild trout in water that looks the way rivers looked before we got to them. When flows drop the water runs gin-clear, which means fish spook and a careful approach matters more than fly choice.

The catch is access, and it is a real one. The road-accessible lower river below Selway Falls is your only DIY trout option without a lottery win, and even that means driving to Lowell at the Lochsa-Selway confluence, about 1.5 hours east of Kooskia on US-12 and a long way from anywhere. The upper wilderness is reachable on foot via trails or from the Magruder Corridor (FR 468), a primitive mountain track that typically does not melt open until mid-July, and guided multi-day float trips are the realistic way most anglers see the wilderness section. If the Selway is out of shape or you cannot draw a permit, the Lochsa next door is its road-paralleled cutthroat twin, and the Clearwater downstream is steelhead water.

Species

  • Westslope Cutthroat Trout
    Primary · Jul-Sep · 12-20"

    The fishery — one of the most intact native westslope populations in the US, and catch-and-release under Clearwater Region management. Eager dry-fly takers that will eat an attractor off the top in the pockets; most run 12-16" with better fish to 20". Identify by the red-orange slash below the jaw.

  • Rainbow Trout
    Present · Jul-Sep · 10-16"

    A minor resident presence alongside the cutthroat, with some cutbow hybridization (crosses run 12-18"). Mixed in through the pocket water but never the main event.

  • Bull Trout
    Present · Protected · to 24"+

    Native char, catch-and-release only statewide — do not target, handle minimally, and release immediately if hooked incidentally. Holds in the deepest cold holes.

  • Mountain Whitefish
    Abundant · Year-round · 8-16"

    Native and everywhere, readily taking nymphs. Overlooked, but a sign of healthy water and something to keep a slow day interesting.

  • Brook Trout
    Present · Jul-Sep · 6-12"

    Introduced and holding in some tributaries rather than the mainstem. Small but willing on attractor dries.

  • Steelhead
    Present · Protected · to 30"+

    B-run steelhead ascend the lower river in fall and winter. The Selway sits above most steelhead pressure, but fish do reach it — anadromous rules and seasons apply, and they are otherwise protected.

  • Chinook Salmon (spring run)
    Present · Protected · large

    Spring and summer chinook were confirmed in 2025 IDFG surveys. Protected — no fishing. Their presence underscores the wild, intact character of the drainage.

Ideal wading flow1,500–3,500 CFS
Blow-out>8,000 CFS
Ideal water temp50–62°F

Mid-summer is the sweet spot — through July the salmonfly and golden stone emergence tails out into PMDs, caddis, and Yellow Sallies as flows drop, and the fishing keeps improving as the river falls toward late summer. August brings hopper and terrestrial season over the lowest, clearest water of the year; September adds October caddis and fall BWOs before road access starts to close down. At the Lowell gauge (13336500) the wade window runs roughly 1,500 to 3,500 CFS, clear and dropping. Spring is a non-starter — snowmelt peak in May and early June pushes the river well into five figures and it is unfishable and dangerous, not dropping into shape until mid-to-late June. In a hot late-August spell, watch afternoon water temps and fish mornings.

Sections

2 sections on this river

Lower Selway — Selway Falls to Lowell (road-accessible)

WadeCutthroat · Bull Trout · Rainbow Trout · Whitefish

The lowest ~21 miles and the only water on the river you can reach with a truck — classic freestone pocket water, riffles, and deep gin-clear pools traced by gravel Forest Road 223 from Lowell up to Selway Falls. Wild westslope cutthroat trout eat big attractor dries in the pockets, with mountain whitefish throughout and protected bull trout in the deepest cold holes. The primary USGS gauge near Lowell sits mid-reach. Note the short middle stretch from the Selway Falls cable car up to the Selway Falls bridge is closed to fishing.

Best for: Wild westslope cutthroat trout on dries and dry-droppers; the one stretch fishable without a wilderness permit or a multi-day float.

Upper Selway — Paradise to Selway Falls (wilderness, permit-only)

FloatCutthroat · Rainbow Trout

Roughly 47.8 miles of wilderness river dropping about 28 ft/mile through the Selway-Bitterroot — technical Class III-IV whitewater with countless untouched cutthroat runs between the rapids. Float access only, by lottery permit through the Four Rivers Lottery (put-in at Paradise Guard Station, take-out above Selway Falls); foot access is via wilderness trails and the Magruder Corridor (FR 468), which rarely melts open before mid-July. Essentially zero fishing pressure and a fish-per-run pace for wild westslope cutthroat trout in good conditions.

Best for: Wild westslope cutthroat trout with almost no pressure; multi-day self-support or guided raft trips wade-fishing from camps and eddies.

Regulations

Current fishing rules and restrictions

The Selway and its tributaries are managed as blue-ribbon native westslope cutthroat water — catch-and-release for trout with single barbless hooks on the mainstem and tribs. A short middle stretch at Selway Falls is closed to fishing entirely, and bull trout, steelhead, and chinook are all protected. Confirm the current-year Idaho rule book before your trip.

  • Selway and tributaries: catch-and-release for trout, single barbless hooks (blue-ribbon native cutthroat management)
  • Lower section (mouth up to the Selway Falls cable car): barbless hooks required; Dec 1 to the Friday before Memorial Day is catch-and-release for trout, then a 2-trout / 14" minimum limit and no bait from Memorial Day weekend through Nov 30
  • Middle section (Selway Falls cable car to the Selway Falls bridge): CLOSED to fishing
  • Bull trout: catch-and-release only statewide — do not target, release immediately if hooked
  • Steelhead and chinook: anadromous fish are protected here; separate permit and season rules apply
  • Wilderness float (Paradise to Selway Falls) requires a Four Rivers Lottery permit (recreation.gov #234624 / Bitterroot NF); apply Dec 1 to Jan 31
  • Valid Idaho fishing license required (nonresident daily and season options available)

Regulations here are researched for the 2026 general season — Idaho rules run on a 2-year cycle, so always confirm the current rule book, as cutthroat, bull trout, and steelhead rules and zone boundaries change. The middle stretch closure at Selway Falls is easy to miss and strictly enforced.

Source: Idaho Department of Fish and Game — Fishing Planner. Regulations change annually — verify before fishing.

Access & Logistics

Getting there, fly shops, and lodging

Getting There

Lowell, ID

~2.5-3 hr up the Clearwater from Lewiston, ID (LWS); ~3.5-4 hr from Missoula, MT (MSO); ~4.5 hr from Spokane, WA (GEG)

Fly Shops

Camping & Lodging

USFS campgrounds line Forest Road 223 on the lower river (O'Hara, Race Creek, Slims, and the Fenn Ranger Station area), with lodging near the Lochsa-Selway confluence at Lowell and down US-12 toward Kooskia and Kamiah. Wilderness camping above the falls is by float permit. The nearest full-service towns are Kooskia, Grangeville, Orofino, and Lewiston.

The lower river below Selway Falls is the only road-accessible, DIY trout water — reach it by driving to Lowell at the Lochsa-Selway confluence on US-12, then up gravel FR 223. The upper wilderness is float-only by lottery permit, or on foot from wilderness trails and the Magruder Corridor (FR 468), which typically does not open until mid-July. Guided multi-day float trips are the realistic way most anglers fish the wilderness section. There is no fly shop on the river; stock up and buy licenses in Kooskia, Kamiah, or Lewiston.

Conditions data is live from public monitoring networks. Regulations change annually — always verify current rules with your state fish & wildlife agency before fishing.

More in Idaho

View all 17 rivers

North-Central Idaho

Clearwater RiverID

A big, cold, low-elevation river that draws anglers from all over for one thing: B-run steelhead — the largest summer-run steelhead south of the Canadian border, ocean-going rainbows that average 10-13 pounds and push past 20. It's classic spey country, swung flies on broad even-depthed runs from Lewiston up through Peck and Lenore, with a shoulder-season dry-fly window for native westslope cutthroat and rainbows when the main stem drops and cools.

Lochsa RiverID

A wild, unstocked freestone that runs right along US-12 for 70 miles of clear-water pocket water — native westslope cutthroat that eat dries two steps from the pullout, plus bull trout in the deep holes. Snowmelt-driven and treacherous to wade; it's a walk-and-wade river, not a trout float, and rarely comes into shape before mid-July.

North Fork Clearwater RiverID

A big, remote freestone above Dworshak Reservoir holding one of the Northwest's best wild westslope cutthroat fisheries — 79 roadless-feeling miles of pocket water and green runs where eager natives eat attractor dries. Its tributary Kelly Creek has been catch-and-release since 1970.

Other regions

Big Lost RiverID

A high-desert freestone under the Pioneer and White Knob ranges that turns, below Mackay Reservoir, into a short cold tailwater growing wild rainbows past 20 inches — then spreads out below Arco and sinks into the desert at the Big Lost Sinks without ever reaching the sea.

Big Wood RiverID

The freestone that runs down the spine of the Wood River Valley past Ketchum, Sun Valley, Hailey, and Bellevue — a wild, unstocked river of heavily spotted rainbows and thick lower-river browns, best fished on foot with a dry-dropper once July runoff clears.

Boise RiverID

The rare trout tailwater you can fish on a lunch break — cold, clear water off the bottom of Lucky Peak Dam runs straight through downtown Boise, paralleled the whole way by the paved Greenbelt. Wild brown and rainbow trout (browns commonly 16-20 inches), native redband, and abundant mountain whitefish. Flood-control and irrigation releases dominate: summer often pushes 1,000-7,000+ CFS and fishes poorly, but the river turns on after irrigation season ends in fall and through winter at a wadeable 150-600 CFS.

Fall RiverID

The Fall River is the largest tributary of the Henry's Fork, a runoff-fed freestone that tumbles off the Pitchstone Plateau in southwest Yellowstone, past a string of waterfalls, and out onto the potato ground east of Ashton. It fishes late — high and off-color into June, then a July salmonfly-to-PMD dry-fly river most Henry's Fork anglers drive right past.

Henry's ForkID

The Henry's Fork is the spring-fed tailwater that runs from Henrys Lake through Island Park and on to its confluence with the South Fork Snake near Rexburg. The slow flat water of Harriman State Park (the Railroad Ranch) is the most famous technical dry-fly stretch in the West.

Middle Fork Salmon RiverID

A hundred miles of roadless westslope cutthroat water running through the heart of the Frank Church–River of No Return Wilderness. Access is a five- to six-day float on a private lottery permit or an outfitted trip; the reward is eager dry-fly cutthroat protected as catch-and-release with single barbless hooks since 1973.