Every August, in the lower few miles of the Columbia River where it meets the Pacific Ocean — the area marine charts mark with a single buoy called Buoy 10 — somewhere between 800,000 and 1.5 million Chinook and coho salmon push back into freshwater to spawn. In a single month, hundreds of thousands of fish funnel through a tidal estuary perhaps three miles wide. The recreational fleet shows up in equal force. On a peak weekend in late August, the line at the Astoria, Oregon, boat ramp at 4 AM can be 400 trailers deep.
It’s the most consistent salmon fishery on the Pacific coast of the United States. The Buoy 10 fishery has produced over 100,000 angler-trips a season for decades. And despite the crowds — or partly because of them, since pressured fish move and feed in predictable ways — the catch rates are extraordinary. A typical mid-August day for a competent angler produces 2-4 chinook hookups plus coho on top. The two-fish limit on combined salmon (with season-specific variations — always verify Oregon and Washington regulations annually) gets reached most days the bite is on.
For East Coast anglers raised on stripers and tarpon, Buoy 10 is a different kind of fishery — a tide-driven, technique-driven affair where the difference between catching nothing and hitting limit is the disciplined application of the basics. Here is the framework worth walking in with.
What Buoy 10 actually is
Buoy 10 is the place where the Columbia River — second-largest river in the lower 48 by volume — meets the Pacific Ocean. The river is several miles wide at this point. The bottom is irregular and shifting. The current can run 6 knots or more on a peak ebb. The tide pushes saltwater 25+ miles upriver on a flood. Twice a day, billions of gallons of water cycle through.
The salmon stage in this brackish zone before pushing upriver to spawn. They’re fresh from the salt — bright silver, with sea lice still attached — fat, aggressive, and feeding heavily. Once they push above Tongue Point (the upper boundary of the official Buoy 10 zone), they stop feeding and become technically much harder to catch. Buoy 10 is the last window to catch these fish in feeding mode.
Two main species:
- Fall Chinook (king salmon, tyee). 15-40+ lb fish. The headline species. Heavy fighters, beautiful condition.
- Coho (silver salmon). 6-15 lb fish. Aggressive, jumpy, fun on lighter tackle. The numbers fish.
A handful of others occasionally come over the rail: jack chinook (immature returning fish, often released), sockeye (early in the season), the occasional steelhead.
The recreational season at Buoy 10 typically opens August 1 and runs through late August or early September, with intra-season modifications based on catch quotas. Always verify season dates with Oregon Department of Fish & Wildlife and Washington Department of Fish & Wildlife. The rules can change mid-season.
The tide is the fishery
If there’s one thing to know about Buoy 10, it’s this: the tide is not a factor. The tide IS the fishery.
The ocean tide at the Columbia River entrance moves enormous volumes of water through a constricted opening. Slack tide periods are short — maybe 30-45 minutes either side of published slack. Outside the slacks, the current rages.
On a strong outgoing tide, the river flushes east-to-west. Salmon hold in current breaks behind shoal areas, in eddies behind points, on the down-current side of structure. Boats anchor or drift through these breaks.
On a strong incoming tide, the situation reverses. Water pushes west-to-east, the salmon redistribute, and the productive water is on the OTHER side of the same structure.
On the slacks, fish are not committed to any particular position. They scatter. They roam. The bite is generally slow.
Boats that consistently produce fish at Buoy 10 read the tide-current relationship in real time. They reposition with the tide. They don’t just sit in one spot. The classic mistake out-of-area anglers make is finding a spot at 6 AM, dropping anchor, and staying there all day. The tide changes at noon and the spot stops fishing — but the angler doesn’t move. By 4 PM they’ve fished half the day on dead water.
The professional charter captains move every two to three hours. If a spot stops producing, they reposition. They are constantly thinking about the tide cycle ahead of them, not behind.
The productive zones
Within the few-mile Buoy 10 zone, certain spots produce year after year. The classics:
Hammond and the Hammond Boat Basin. South side of the channel, west end of the zone. Often crowded but consistently productive.
The Desdemona Sands and Sand Island shoals. Mid-channel shallow water that creates current breaks. Salmon hold on the down-current edges.
Tongue Point. The eastern boundary of the zone, where the river constricts. Fish stage here before pushing upriver.
The Astoria-Megler Bridge. Where the bridge crosses the Columbia. Pilings create current breaks. Excellent fishing right under or just up/down current of the bridge.
The Buoy 10 marker itself. Just inside the bar, in the current line. Holds fish on the outgoing tide.
Each of these spots fishes differently on incoming vs outgoing. A chartplotter and a basic understanding of where the deeper holes and channel breaks are make the difference between productive water and empty water.
How the locals actually fish
The classic Buoy 10 technique: trolling herring behind a flasher rig.
Setup:
- Rod: 8 or 9-foot moderate-action mooching/trolling rod
- Reel: Line-counter conventional reel (Shimano Tekota 600, Daiwa Saltist LC), spooled with 30-40 lb monofilament (not braid — mono provides stretch and shock absorption)
- Mainline: 30 lb mono
- Diver or weight: Banana sinkers 6-10 oz, or a Pro-Troll Flasher with a diver
- Leader: 30 lb fluoro to a barrel swivel, then 40-50 inches of 25 lb fluoro to the bait
- Bait: A whole green-label or blue-label herring, plug-cut to a slight curve that makes it spin on the troll
The herring is cut at a specific angle — a Buoy 10 plug-cut — that creates a slow corkscrew rotation when trolled. The spin imitates a wounded baitfish and triggers chinook to strike. Most Buoy 10 guides cut herring at the dock in the morning and rotate fresh baits every 30-45 minutes. A herring that’s lost its spin has lost its effectiveness.
Troll speed: 1.2 to 2.0 mph. Slow. Slower than feels comfortable for most ocean trollers. The salmon want a slow, swimming bait.
Depth: Variable — 10 to 50+ feet depending on tide, light, and fish stage. Most charters run two rods at different depths on each side, watching which depth produces.
Direction: Generally with the tide initially, then turning to troll against the tide for a slower presentation through the same water. The latter often produces more fish.
This is the technique that produces 80% of Buoy 10 salmon for 80% of anglers. The technique itself isn’t complicated; consistent execution is.
What separates locals from visitors
Some specifics that visiting anglers consistently get wrong:
Sharpen the herring rotation. Bait at Buoy 10 is treated like a perishable consumable. The local fleet rotates herring every 30-45 minutes. Newcomers tend to leave a bait on for 90 minutes “to give it time.” That’s wrong. Fresh, properly-cut herring catches fish. Dead, sloppy, no-spin herring doesn’t.
Watch the locals. The charter fleet at Buoy 10 has been working the same water for decades. If you see three charter boats trolling parallel through the same zone, you’re in the productive water. If you’re the only boat for 200 yards, you might be on a dead zone. Use the fleet as an indicator without crowding their water.
Drift fishing the slacks. During the 30-45 minutes of slack tide, the trolling bite often dies. Some local anglers switch to anchoring in deeper holes and drift-fishing with a chunk of cut-plug herring or a heavy jig (1-2 oz Buzz Bombs or Point Wilson Darts). It’s a niche tactic but it can keep the day going during the dead window.
The afternoon push. Many anglers leave by 11 AM after fishing the dawn bite. The mid-afternoon outgoing tide often produces a second strong bite window from 2-4 PM that the morning crowds miss. Anglers willing to stay all day get this second window largely to themselves.
Coho-specific tactics. Coho often hold higher in the water column than chinook. If a trip is missing coho when they should be biting, raising the gear 10-15 feet often fixes it. Coho will also hit faster troll speeds and brighter colors than chinook will.
The trip logistics
Buoy 10 is in Astoria, Oregon — the mouth of the Columbia, about 90 miles west of Portland by car. The town is set up around the fishery. Boat ramps are packed by 4 AM in August. Hotels book months in advance for peak August weekends.
First-timer recommendations:
- Hire a charter for at least one day. $250-400/person, 6-7 hour trip, fish typically cleaned and bagged for you. A first-timer learns more in one day with a Buoy 10 charter captain than in a season of self-guided fishing.
- Stay in Astoria, Hammond, or Warrenton (Oregon side) or Ilwaco (Washington side, north of the river). Each side has its own ramp access. Ilwaco is often less crowded.
- Bring rain gear regardless of the forecast. The Pacific Northwest in August is mostly dry, but a single morning of mist or fog can soak unprepared anglers.
- Hydrate. The Buoy 10 sun in August reflects hard off the water.
For returning anglers going self-guided:
- Check ODFW and WDFW season notices the week before the trip. Rules change mid-season.
- Re-watch a few of the technique videos from local guides on YouTube. The herring cut and rigging is detailed enough that periodic refresher helps.
- Plan to arrive 24+ hours before fishing to acclimate. Buoy 10 is a high-volume, high-current fishery — being on the rods well-rested is the difference between a good day and a frustrating one.
The conservation note
The Columbia River salmon runs are recovering from a brutal mid-20th-century population crash caused by dams, habitat destruction, and overharvest. The fish caught at Buoy 10 in August are descendants of fish that survived four-plus generations of disrupted ecosystem.
The wild stock is supplemented by hatchery production — most chinook and coho returning to Buoy 10 are hatchery-origin fish, identifiable by a clipped adipose fin. Some seasons, only hatchery-clipped fish may be retained; wild fish (intact adipose) must be released. Always verify current season rules with ODFW and WDFW.
Handle every fish thoughtfully. Net them quickly. Use barbless hooks (mandatory in some seasons). When releasing a wild fish, keep it in the water and let it kick free on its own. The fishery exists because of the conservation work happening upstream of it.
Final thought
Most fishing trips reward the angler who shows up and tries. Buoy 10 rewards the angler who shows up and applies a specific sequence — read the tide, fish the right zone, troll at the right speed with fresh bait at the right depth, and keep moving when a spot stops producing. The “secret” of consistently productive Buoy 10 anglers is just the practiced application of those fundamentals, in water where the fundamentals actually matter.
That, more than anything, is what August at Buoy 10 demands: salmon are there in numbers no other fishery on the Pacific coast can match, they are catchable, and the variable is the angler. Show up with the right tackle, the right respect for the tide, the right bait rotation, and the willingness to keep moving — and the Columbia returns the favor.
It belongs on every serious salmon angler’s life list. Worth the trip at least once.
Dennis Suler is a career outdoors writer and lifelong angler. He spent six years on the editorial staff of The Fisherman magazine as a field editor and managing editor — first editing the New Jersey reports section, then managing editor of the Mid-Atlantic edition. He also served as managing editor of Boater’s Digest magazine. He’s a member of the Outdoor Writers Association of America and writes for fishing.digital — covering 40+ U.S. fishing destinations with weekly reports, location guides, and feature articles.
This article is part of fishing.digital’s Pacific Northwest regional coverage. For weekly reports across the Columbia River, Puget Sound, the Olympic Peninsula, and the rest of the Pacific Northwest, visit fishing.digital/newsletter and subscribe to fishing.digital West Coast Weekly.