Cowlitz River

A separate, smaller free-flowing mountain reach above Riffe Lake and Mayfield Lake, following the US-12 corridor between Packwood and Randle — glacially tinged flows off Mt. Rainier and a wild resident rainbow trout fishery that has nothing to do with the anadromous hatchery river downstream. USGS gauges sit at both Packwood and Randle. Wadeable in reaches, though glacial melt can cloud it through summer. Anglers treat this as an entirely different river from the lower Cowlitz.

Best for: Wild resident rainbow trout on dries, nymphs, and terrestrials — a small-stream mountain trip, not the steelhead river. Best when summer glacial melt isn't clouding the water.

Big, pushy runs and holding water immediately below the Cowlitz Salmon Hatchery's barrier dam near Salkum — the highest fish concentration and the highest angler concentration on the river. Everything stacks here: winter and summer steelhead, spring and fall chinook salmon, coho salmon, and sea-run cutthroat trout. It's overwhelmingly a gear-and-bait fishery of bobber-and-jig and side-drifted eggs from before dawn, so fly anglers work the edges — swinging summer steelhead through the riffles above Blue Creek and targeting cutthroat around the hatchery outfalls.

Best for: Everything is here, but it's crowded and gear-dominated. Fly anglers swing summer steelhead in the upper riffles and pick off sea-run cutthroat trout near the hatchery outfalls.

Below the Blue Creek launch the crowds thin fast. This is long, gently sloping gravel-bar water — tailouts and gliding runs that are classic swing and float water once you're past the hatchery combat zone. The bank is mostly private, so it fishes as a drift-boat float. This is the under-pressured heart of the fly fishery: sea-run cutthroat trout on small streamers and dries in September and October, and summer steelhead on the swing where the two-handed rod earns its keep. Public access at Massey Bar and near Toledo.

Best for: Sea-run cutthroat trout on small streamers and soft hackles (Sep-Oct) and swung summer steelhead, away from the crowds. A boat is required for good access.

The wide, slower valley river running down toward the Columbia confluence, with the USGS gauge at Castle Rock sitting at the bottom of the reach. This is the fifty-plus miles of lightly fished lower river — good sea-run cutthroat trout and fall coho salmon water where the river is fishable. It's the first stretch to color up after heavy rain, because the Toutle River dumps its ashy, glacial load in below Castle Rock; after a storm, fish above the Toutle.

Best for: Sea-run cutthroat trout and fall coho salmon on a drift-boat float, with the whole lower river essentially to yourself. Turbid after Toutle-driven storms.