Where the road ends at Selway Falls
Lowell is the hinge. The Selway comes down out of the Bitterroots and meets the Lochsa there to form the Middle Fork Clearwater, and Idaho Fish and Game's planner counts about 100 miles of Selway above that confluence. Only the bottom of it has a road. RiverReports describes Forest Road 223 running 21 miles from Lowell up to Selway Falls, with 13 campgrounds along it, including Rackliff with six sites right on the river and Boyd Creek with five.
That corridor is where almost everyone who fishes the Selway actually fishes it. RiverReports rates the upper end near the falls as the best wade water on the road, and the river is broken riffles and pocket water through most of it.
The closed pool at the falls, and the 14-inch rule below it
Know the boundary markers before you string up. Idaho's 2025 to 2027 Clearwater Region rules close the Selway to fishing from the Selway Falls cable car upstream to the Selway Falls Bridge at Meadow Creek. Look for the posted signs at both ends before you wade in anywhere near the falls.
From the mouth at Lowell up to the cable car, barbless hooks are required all year. From December 1 through the Friday before Memorial Day weekend trout are catch and release with no bait except maggots. From the Saturday of Memorial Day weekend through November 30 you may keep two trout, none under 14 inches, and no bait is allowed. Above Meadow Creek the Clearwater Region general rules apply, which in rivers and streams means a two-trout limit. Bull trout are catch and release everywhere, and any rainbow over 20 inches in the Clearwater drainage below Dworshak counts as a steelhead under Idaho law, so it needs a steelhead permit and an open season.
The 47 wilderness miles and one launch a day
Above the falls the Selway runs 47 miles through the Selway-Bitterroot Wilderness, managed by the Bitterroot National Forest through the Four Rivers lottery. From May 15 through July 31 only one party of up to 16 people may launch each day, assigned by a December 1 to January 31 lottery with results in mid-February. From August 1 through May 14 no permit is needed and groups of up to 20 may launch freely.
The Forest Service is blunt about the whitewater: from the launch to the Race Creek take-out the river drops an average of 28 feet per mile, and below the Moose Creek confluence the gradient steepens to 50 feet per mile with a big jump in volume. Permits are picked up through the West Fork Ranger District near Darby, Montana, and the launch is a long drive in on the Nez Perce Road, number 468. A trip of this kind is a whitewater expedition with fishing, not the other way around.
Two gauges that do not agree
The number on this page is USGS 13336500 near Lowell, at the bottom of the river, and Recreation.gov warns that it does not correlate with the foot gauge at the wilderness launch, which is what floaters watch. The permit rules key off that upper gauge: above five feet the late cancellation penalty is waived, and launching above six feet is not recommended.
For wade fishing the road corridor, Lowell is the right number. No shop publishes a wading range for it, so the 600 to 1,100 cfs used here is the gauge's own record: median monthly flows since 1911 run about 830 cfs in August, 630 in September, 770 in October and 1,100 in November, against more than 10,000 in May and June. RiverReports called the river prime summer water in late August 2026 at about 611 cfs.
Stones in early summer, olives at the end
Nobody publishes a Selway-only hatch chart, so the table borrows RiverReports' timing for the neighboring North Fork and Kelly Creek country, which shares the same westslope cutthroat and freestone insects: salmonflies in mid-June, golden stones late June into July, yellow sallies and PMDs through July and August, caddis all summer, tricos in late summer and blue-winged olives in September and October. Their late-summer reports from the Lochsa next door add hoppers, and dry-dropper rigs with a Chubby Chernobyl over a small jig nymph are the standard approach.
Plan around runoff. With June medians above 10,000 cfs at Lowell, the stonefly hatches often happen on water too high to fish well from the road, and the record shows the river falling steeply through July toward its late-summer level.