Coho Salmon Fishing in Washington: How To Follow the Run From Ocean to River

Most anglers fishing for coho salmon in Washington realize they are migrating from ocean to tributaries. So you can’t expect your ocean spot in July is going to fish well through November. You have to follow the fish up the river.

Coho don’t sit still. They move from the open ocean off Astoria to the staging grounds at Buoy 10, then push upriver into Washington’s tributaries over the course of a couple of months.

Every season is a little different, with timing influenced by ocean conditions, water temperatures, and river flows. But the overall migration pattern remains remarkably consistent. Knowing where coho are in their journey can make the difference between slow days and nonstop action. Here’s how the run unfolds, stage by stage.

Table of Contents

• What Month Is Best for Coho Salmon Fishing in Washington?
• 4 Coho Fisheries To Follow as the Run Moves Through Washington
• Why Can Coho Salmon Fishing Be Harder in Washington Rivers?
• Hatchery Identification and Coho Salmon Fishing Limits in Washington
• Plan Your Washington Coho Salmon Fishing Trip With Pacific Drifter Guide Service

What Month Is Best for Coho Salmon Fishing in Washington?

August and September are usually best for coho salmon fishing in Washington, especially around Buoy 10 and Puget Sound. Ocean fishing near Astoria can start strong in late July and August, while river systems like the Klickitat often fish best from October into November as coho push farther inland.

This year’s forecast makes almost every stage of this run worth planning for, from the early ocean bite through the late tributary runs, especially with the Washington Department of Fish and Wildlife’s latest salmon forecast bulletin giving anglers a stronger planning signal than usual. 

Coho don’t read forecasts, though. Ocean conditions, water temperature, and timing can all shift a good season into a great one or a slow one. You should treat the numbers as reason for optimism, not a guarantee.

Ready to build a trip around one of these windows? Book a coho charter with Pacific Drifter Guide Service timed to the stage of the run that fits your calendar: ocean, Buoy 10, or upriver. We’ll plan around where fish are likely to be holding, not where they were three weeks ago.

4 Coho Fisheries To Follow as the Run Moves Through Washington

#1: Ocean Fishing Near Astoria (Late July–August)

The run starts offshore. Coho stage in open water near Astoria before pushing toward the Columbia, and this early window often produces some of the most consistent action of the year.

Trolling is the standard here. Anchovies and herring work, but stuffer baits (plastic bait bodies packed with anchovy or tuna chunks) and hoochie rigs paired with a spinner blade round out the setup most guides run. 

Ocean coho often give anglers a broader planning window than short in-river openers. However, the exact dates and retention rules still depend on the annual ocean salmon package, including the 102,900 hatchery-marked coho ocean quota currently set. That gives anglers a wider window to plan around compared to the tighter, shorter fisheries closer to shore.

#2: Buoy 10, Where Coho Stage at the Mouth of the Columbia

Buoy 10 marks the mouth of the Columbia River, right where coho pause and stage before committing to the river current. That staging behavior is exactly why the fishing can be so good in August and September; fish concentrate in a relatively small stretch of water before they push upstream.

What surprises a lot of anglers is how long Buoy 10 keeps producing. Once Chinook season closes in early September, boat traffic thins out, but coho stick around. That combination, fewer boats and still-active fish, makes September one of the most underrated windows on this entire run.

#3: Drano Lake, a Quieter Columbia River Option

Drano Lake sits upstream of the estuary, and it’s the option guides lean on when Buoy 10 gets crowded. It’s not a secret spot, exactly. It’s just less fished.

Once coho push past the mouth of the Columbia, Drano Lake picks up fish on a similar timeline to Buoy 10, without the same boat pressure. For anglers who want to go fishing for coho salmon in Washington without fighting for water, it’s worth having this one on the list as a backup.

#4: Klickitat River and Fall Tributary Fishing (October–November)

By October, the run has moved well upriver, and the Klickitat becomes the focal point. Fewer anglers make the trip out this far in the season, which means better water and less competition for the same fish.

Coho continue pushing into other Washington tributaries through November as the run tails off. It’s a quieter, more technical stretch of the season, but it rewards anglers willing to chase fish instead of waiting for them to show up close to home.

Why Can Coho Salmon Fishing Be Harder in Washington Rivers?

Coho stop feeding once they leave saltwater. The shift moves them from predatory feeding behavior to territorial aggression, which is why bait presentations that work at Buoy 10 stop producing once those same fish enter a tributary.

That behavioral change is the single biggest reason river fishing feels harder than ocean fishing, even for anglers with years of saltwater experience. A herring presentation that triggers strikes offshore won’t get a look from a fish holding in a river pool. Aggressive, erratic lures work instead, because the fish is reacting out of irritation, not hunger. 

Researchers have documented this shift as part of the broader salmon physiology during spawning migration that happens once anadromous fish leave the ocean for good. It’s the same reason technique has to change completely between Buoy 10 and the Klickitat, even though we’re talking about the same fish, just a few weeks apart.

Hatchery Identification and Coho Salmon Fishing Limits in Washington

In many Washington coho fisheries, the daily limit for coho is two adult salmon. Hatchery coho often need to measure at least 16 inches to keep, but coho salmon fishing limits in Washington can change by marine area, river section, and emergency rule.

A clipped adipose fin is what separates a legal keeper from a wild fish that may have to be released. Hatchery coho have that small fin clipped, leaving a healed scar; wild coho still have the fin intact and must be released regardless of size or if regulations prohibit wild retention.

If you’re ever unsure if a fish is hatchery or wild, let it go. Regulations shift by marine area and by season, so check the current Washington coho catch limits and hatchery coho identification information before you head out, since rules can change mid-season based on how the run is tracking.

When you fish with Pacific Drifter Guide Service, there’s no need to keep up with every regulation on your own. Guide Jordan Rose has decades of experience fishing Washington waters and stays current on the latest seasons, catch limits, and regulations, allowing you to focus on fishing with confidence.

Plan Your Washington Coho Salmon Fishing Trip With Pacific Drifter Guide Service

Following the run beats guessing. Instead of picking one spot in July and hoping it still holds fish in October, plan your trip around the stage of the migration that fits your schedule, whether your best window is ocean trolling out of Astoria, staged fish at Buoy 10, or fall tributary fishing on the Klickitat.

As your Portland fishing guide, Pacific Drifter Guide Service spends the season tracking exactly where coho are holding, so you’re not left chasing a run that’s already moved on. Get in touch and let’s find your window.