Lochsa River

The Lochsa is a 70-mile wild freestone that runs right beside U.S. Highway 12 for nearly its entire length, from the Crooked Fork and Colt Killed Creek confluence at Powell down to Lowell, where it joins the Selway to form the Middle Fork Clearwater. Idaho Fish and Game doesn't stock a single fish here, so everything you catch is native and wild — mostly westslope cutthroat, 10 to 15 inches and eager to eat off the top. The draw isn't size; it's clear-water pocket water full of trout that look up, in a roadless canyon of old-growth cedar where you're rarely more than a few steps from the truck. Bull trout to double digits hold in the deep cold holes, mountain whitefish are everywhere, and the whole drainage is a managed wild steelhead refuge.

Practically, this is a wade-and-walk river, not a trout float. The whitewater outfitters running the corridor are here for the Class III-IV rapids, not the fishing, and the wading is genuinely treacherous — bowling-ball boulders, deceptively deep pools, and heavy canyon current that make a wading staff earn its keep. The river is pure snowmelt, so it blows out hard and stays off-color through spring; most years it doesn't drop into shape until mid-July, and the prime window runs late July through October. A 5-weight covers most of it; step up to a 7- or 8-weight if you're swinging streamers for bull trout in the deep holes. Dry-dropper rigs and short, controlled drifts against fast water are the bread and butter, and the salmonfly-to-golden-stone progression from June into August is the marquee dry-fly event once flows drop.

Access is the easy part — dozens of Forest Service pullouts and campgrounds line US-12, and roadside fishing is free with a standard Idaho license. The trade-offs are remoteness and homework. There's no fly shop on the river; the nearest full-service shops are two hours east in Missoula, Montana, or down the Clearwater near Kooskia, and none guide or report on the Lochsa. Regulations reward reading the rule book: cutthroat are catch-and-release, bait is prohibited above the Wilderness Gateway bridge, bull trout are fully protected, and steelhead may not be targeted. The headwater tributaries — Crooked Fork and Colt Killed (White Sand) Creek — hold less-pressured, sometimes larger fish for anyone willing to hike in.