Fishing at the Cowlitz River
One of the best all-around salmon and steelhead rivers in the state, the Cowlitz offers up something to catch at pretty much every month of the year. It's a big, hatchery-supported system that can produce serious numbers of fish, making it a favorite for anglers who want a real shot at hooking up, whether that's your first steelhead or your hundredth.
Where is the Cowlitz River
The Cowlitz River flows out of the Cascades near Mount Rainier and White Pass, running about 105 miles southwest through Lewis and Cowlitz counties before joining the Columbia River near Longview and Kelso. It's a big, glacially-influenced river shaped heavily by the Mossyrock, Mayfield, and Cowlitz Falls dams upstream, which help keep flows and water clarity more stable than many nearby rivers see. The lower river around Castle Rock and Kelso is wide, road-accessible, and lined with boat launches, while the middle river near Toledo and Salkum, closer to Mayfield Lake, narrows and offers some of the most productive water on the system.
From Seattle, plan on roughly a two-hour drive to reach the lower Cowlitz around Castle Rock or Kelso, heading south on I-5 the whole way. The middle river near Blue Creek and Salkum, arguably the most famous stretch on the river, adds another 20 to 30 minutes via Highway 12. It's a longer trip than the Green or the Duwamish, but for many anglers the extra drive time is well worth it given how consistently productive the Cowlitz can be.
Cowlitz River Map
What you can catch in the Cowlitz River
The Cowlitz is best known for its exceptional hatchery production, and it shows in the variety and volume of fish available throughout the year. Spring and fall Chinook salmon both run strong, supported by one of the largest hatchery operations in the state near the Barrier Dam. Coho salmon arrive in big numbers each fall, and both summer-run and winter-run steelhead provide months of opportunity, making the Cowlitz one of the few Washington rivers with a nearly year-round steelhead fishery. Sea-run cutthroat trout show up as a welcome bonus catch, especially near the hatchery separator, and resident trout can be found in the upper river above the dams. As with most heavily managed hatchery rivers, wild fish and certain runs are protected, so knowing how to identify a fin-clipped hatchery fish before you keep anything is essential.
Cowlitz River Fishing Seasons
Spring brings the first big push of the year: spring Chinook typically begin showing in March and build through April and May, drawing anglers to the middle river near the hatchery at Blue Creek, as well as Barrier Dam. Flows tend to stay clearer and more manageable than on undammed rivers, thanks to the upstream reservoirs, which makes the Cowlitz a good bet even after a rainy stretch. It's an exciting season to chase bright, hard-fighting spring kings before the crowds of summer arrive. B-Run Steelhead are equally popular during this time, and draws a number of jet boats, drift boats and bank anglers from Toledo upriver to Barrier. Boaters will side drift with corkies & bait, or back-troll wrapped Kwikfish and Mag Lip plugs. A bait diver with a spin-n-glo and sand shrimp is a winning ticket for Springers and Steelhead alike.
Summer is steelhead season on the Cowlitz. Summer-run steelhead begin arriving in June and provide action clear through August, with fish stacking up in the productive water around Blue Creek and the lower river. Warmer, lower flows make this a great stretch for both boat and bank anglers to get out consistently, and the summer steelhead here have a well-earned reputation as some of the hardest-fighting fish in the region. Nothing beats hooking into a cart-wheeling summer-run on a hot summer afternoon. Side-drifting and drift-fishing with corkies or cheaters and bait is best, make sure to downsize your offerings to match the low-clear water conditions of summer.
Fall is when things really get busy. Fall Chinook and coho both move through the system starting in September, with coho typically peaking in October and good fishing continuing into November. This is prime time near the mouth around Kelso and Castle Rock as fish stage before heading upstream, and it's one of the best windows all year to put a beginner on a fish, given how much activity is in the water. Regulations can shift quickly during this period based on in-season returns, so it's worth double-checking before every trip. Casting Blue Fox Vibrax Spinners, twitching jigs, and Brad’s Wigglers will get you into some great fall salmon fishing.
Winter belongs to the Cowlitz's signature fishery: winter steelhead. The run generally starts in December with some hatchery fish moving into the system, with the best fishing typically in February and March. Side-drifting, float fishing, and plunking are the go-to techniques, and the relatively stable, dam-regulated flows mean the Cowlitz often fishes well even when other rivers are blown out from winter storms. For steelhead anglers willing to brave the cold, this is the season the Cowlitz is famous for. Plunking with spin-n-glo’s & bait in higher flows, or drift fishing with corkies & bait can be really effective to catch Steelhead here.
Olequa Creek boat ramp and gravel bar is a hive of activity during the fall salmon season.
Best Fishing Spots on the Cowlitz River
Blue Creek, near the Cowlitz Trout Hatchery and Salkum, is practically synonymous with fishing this river and is widely considered one of the most productive stretches for both salmon and steelhead. The Barrier Dam area, home to the Cowlitz Salmon Hatchery, is another can't-miss location, with a boat launch and consistently good numbers of returning fish. Downstream, the Toledo area and the water around the I-5 Bridge at Castle Rock offer strong bank access and popular boat launches for anglers working the lower river. Near the mouth, Kelso and Longview give easy access as fish stage before pushing upstream, making this a great option for anglers without a boat. Because the river is big, most serious anglers eventually invest in a boat, typically a jet sled, to reach the best water, though there's still plenty of good bank fishing scattered throughout.
Lower Cowlitz River around Castle Rock.
Fishing on the Cowlitz River
The Cowlitz's hatchery infrastructure makes it one of the most productive and reliable rivers in the state, but that same intensive management means the rules are detailed and can change during the season. Boundaries near the hatchery and barrier dam, retention limits, and open or closed sections are all worth confirming before you go, and anglers need a valid WDFW fishing license along with a digital Salmon and Steelhead Catch Record Card from the app. The river has had its share of tough years for wild returns, so always check whether a fish is hatchery-marked before deciding to keep it. With a little planning, the Cowlitz offers some of the most consistent, exciting salmon and steelhead fishing anywhere within driving distance of Seattle, and it's well worth the trip for anglers at any experience level.
