Coho Salmon Season in Oregon: Timing the Run From Ocean to Tributaries

A boat idles at the mouth of the Columbia in late August, waiting on the tide to turn. Coho don’t hold still. They stack up off Astoria, push through Buoy 10, then scatter into Portland-area tributaries as fall settles in.

There’s no single day when Oregon’s coho season “starts.” Fish move through different waters at different times, and each zone carries its own dates and quotas.

Want more information? This guide follows that migration month by month, ocean to inland river, along with the regulations you’ll need before you launch.

Table of Contents

• When Is Coho Salmon Season in Oregon?
• Follow the Oregon Coho Salmon Season From Ocean to Inland Rivers
• Oregon Coho Regulations: What You Need to Know Before You Fish
• What Is the Limit on Coho Salmon in Oregon?
• Can You Fish Coho Year-Round in Oregon?
• When Is the Best Time to Fish Coho Salmon in Oregon?
• Plan Your Oregon Coho Trip With Pacific Drifter Guide Service

When Is Coho Salmon Season in Oregon?

Ocean fishing off Astoria typically opens in late July, Buoy 10 runs strong from August into September, and inland rivers like the Clackamas and Sandy stay open into November. Exact dates shift every year by zone, so treat these windows as a starting point, not a locked calendar.

Oregon Department of Fish and Wildlife sets these windows zone by zone every spring, and the numbers move with the fish. 

• For the stretch from Cape Falcon to Humbug Mountain, mark-selective coho retention (hatchery fish with a clipped adipose fin) usually runs June 6 through Aug. 23, or until anglers reach the 47,600 fish coho quota. 
• Once that window closes, an all-salmon season typically opens Sept. 1 through Sept. 30, letting anglers keep wild and hatchery coho under a separate 27,500-fish non-mark-selective coho quota. 
• Astoria’s ocean season usually opens in late June. Forecasters expect roughly 218,600 coho to return to Oregon waters this year, a number that shapes how liberal or conservative these dates end up. 

But none of it is locked in stone. Before you build an Oregon coho salmon season trip around one specific week, check the current-year regs. Or even better, reach out to Jordan Rose at Pacific Drifter Guide Service to get help planning your perfect day on the water.

Follow the Oregon Coho Salmon Season From Ocean to Inland Rivers

Coho don’t show up all at once and stay put. They stage in saltwater, hold near the river mouth, then push upriver in waves, and reading that progression is how coho salmon get intercepted stage by stage all season long.

Late July–August: Ocean Fishing Off Astoria

Late July is when the ocean bite generally turns on. Coho move into Oregon’s near-shore waters and start feeding hard on baitfish before turning toward the river mouth.

Astoria plays two roles here. It’s a legitimate ocean fishery in its own right, and it doubles as the staging ground for the Buoy 10 run that follows a few weeks later. 

Boats troll spinners, hoochies, plastic stuffer baits, and bait rigged behind a flasher, working water where coho are still packing on weight. Fish caught this early tend to be some of the brightest and hardest-fighting of the whole run, since they haven’t slowed down yet for the push upriver.

August–September: Buoy 10 Transition

Buoy 10, at the mouth of the Columbia River, is where ocean-run coho stack up before committing to fresh water. It’s one of our primary fisheries for good reason: it often stays productive even after Chinook action cools off in late August.

September changes the crowd here more than it changes the fish. Once Chinook seasons close for the year, a lot of boat traffic clears out, leaving more room and, in many years, more generous coho limits for anglers willing to fish into fall. 

Coho typically begin heavy staging in late August as water temperatures start to drop, a pattern well documented in coho migration timing. Bait and small spinners fished near the surface both produce here.

September–November: Columbia and Tributary Rivers

Past Buoy 10, coho keep moving. St. Helens and Scappoose Bay start picking up migrating fish as the run pushes toward Portland, usually by late -September and October. From there, the Clackamas and Sandy rivers turn on once flows cool and fall rain starts stacking up. Fishing these tributaries can stretch into November depending on rainfall, though the window narrows fast once water temperatures drop too far.

Not sure which stage the fish are in this week? Timing this migration takes daily attention, not a glance at a calendar. A Portland fishing guide who’s on the water regularly can put you in the right spot at the right time, whether that means trolling off Astoria or working a tributary seam in October.

Oregon Coho Regulations: What You Need to Know Before You Fish

Before you fish, check Oregon coho season dates by zone.

Regulations shift by zone and by year, so nothing here replaces a current-year check. Still, a few things stay consistent enough to plan around: a valid fishing license, a Combined Angling Tag, and an understanding of which fish you’re actually allowed to keep.

The Combined Angling Tag matters as much as the license itself. Oregon requires it for salmon retention, separate from a standard angling license, and skipping it is one of the more common mistakes first-time coho anglers make. 

When you book a trip with Pacific Drifter Guide Service, you don’t have to worry about keeping track of every regulation on your own. Guide Jordan Rose has more than 30 years of experience fishing Oregon waters and stays up to date on current seasons, catch limits, and regulations, so you can spend more time fishing and less time second-guessing the rules.

What Is the Limit on Coho Salmon in Oregon?

Most zones set a 2-fish daily bag limit with a 16-inch minimum length, though exact numbers shift depending on the specific season and quota status. Mark-selective periods only allow you to keep hatchery coho with a clipped adipose fin; non-mark-selective seasons open retention to both wild and hatchery fish.

That distinction trips up plenty of anglers who’ve fished in other states. A coho with an intact adipose fin looks nearly identical to a hatchery fish at a glance, so during mark-selective windows, checking that fin before you keep anything isn’t optional. 

Wild fish caught during those periods go back in the water, no exceptions. Once September’s all-salmon season opens, that restriction lifts and both wild and hatchery coho can legally go in your cooler, up to the daily limit.

Can You Fish Coho Year-Round in Oregon?

No. Ocean and Buoy 10 seasons run roughly late June through September, and tributary seasons extend into late November, but winter months close entirely once fall runs finish spawning.

The closures aren’t arbitrary. Coho need that stretch of undisturbed water to complete their spawning cycle, and coho salmon spawning and fishery closures help explain why those windows matter for the next generation of returning fish. 

Anglers who show up in December looking for one more trip are usually out of luck until ocean seasons reopen the following summer. Following the migration from Astoria to the tributaries is the only practical way the season works, since no single fishery stays open through every month or is a viable option to catch coho any given month.

When Is the Best Time to Fish Coho Salmon in Oregon?

The best time to fish coho salmon in Oregon depends on where the fish are in the migration. 

Here’s a simple way to think about the season:

• Late July–August: Ocean coho off Astoria
• August–September: Buoy 10 and lower Columbia staging fish
• Mid-September–October: Portland-area Columbia River opportunities
• October–November: Clackamas, Sandy, and other Oregon tributary coho runs

That movement is why Oregon coho salmon season rewards anglers who can adjust. If the ocean is rough, Buoy 10 may still fish. If the river mouth slows, the tributaries may be ready.

Coho don’t wait around for anglers to catch up on the rules, either. Prices, quotas, and even which rivers open can change from one year to the next based on how many fish actually return. That’s why a season built around chasing the migration, rather than fishing one spot all year, tends to put more anglers on fish.

Pacific Drifter Guide Service tracks these shifts on the water and in the current regulations. Booking a trip during the right stage of that migration, if that means an August morning off Astoria or a rainy October afternoon on the Sandy, makes the difference between a slow day and a full cooler.

Plan Your Oregon Coho Trip With Pacific Drifter Guide Service

Oregon coho fishing changes quickly from late summer into fall. One week, the best move may be trolling near Astoria. A few weeks later, the better call may be following fish into the Columbia near St. Helens or waiting for a good rain to wake up the Sandy and Clackamas.

Pacific Drifter Guide Service is built around that kind of timing. Jordan Rose has more than 30 years of experience fishing the Columbia and Willamette watersheds, and he runs boat-based guided trips for anglers who want to follow the fish instead of guessing from the bank.

Get in touch with Pacific Drifter Guide Service to book a coho trip during the right part of the run.