Columbia Chinook Push Hits Stride as May Draws to a Close

What's Biting

What's Next

Late May is one of the Columbia River's most productive migration windows, and the gauge data supports optimism. At 200,000 cfs and 59°F, flows are running at a typical spring-runoff pace, elevated but accessible for most boat setups, and fast enough that reading current seams matters.

Over the next two to three days, late-May snowmelt patterns on the Columbia watershed typically produce stable or modestly declining flows. If temperatures edge upward from the upper 50s toward the low 60s, spring Chinook are likely to accelerate their upstream push. Fish at this stage tend to move through quickly rather than stack, so placing your drift or anchor set at traditional eddy lines downstream of points and mid-river islands gives the best shot at intercepting traveling fish. Side drifting cured roe or running anchored spinners in the 10-to-20-foot zone has historically been effective during high-flow migration pulses.

For sturgeon, the same elevated flows that move salmon also concentrate fish near deeper mid-channel shelves and downstream tailouts. Back-bouncing near the bottom in the 20-to-40-foot range is a proven approach when flows are running at this volume. Note that white sturgeon retention windows on the Columbia are tightly managed and subject to real-time emergency closures: check current slot limits and open dates before launching.

The shad run is worth targeting this weekend. The Columbia's shad typically peak between late May and mid-June, and at 59°F the river sits squarely in the temperature window. Shad stack in slower current near shore and below dams, responding well to small darts and spoons fished on a downstream swing. The run often delivers fast light-tackle action and serves as a useful read on current clarity and flow behavior for anyone scouting conditions ahead of a salmon trip.

First-quarter moon phase offers moderate tidal influence on the lower river but less pronounced bite surges than a full or new moon; expect steady rather than peaky windows. Early morning remains the preferred timing window for Chinook. Monitor USGS gauge 14105700 daily: a quick rise of 10,000 to 20,000 cfs on a warming day can push fish out of predictable lies within hours.

Context

Late May on the Columbia River historically marks the transition between the heart of the spring Chinook run and the early appearance of summer steelhead. Passage counts at Bonneville Dam, the standard benchmark for the mainstem run, typically climb through April and peak in early-to-mid May in average years, with a secondary pulse extending into June depending on snowpack release. Water at 59°F is consistent with typical late-May readings at The Dalles gauge, though cooler-than-average spring snowpacks can push peak flows and warmest temperatures a week or two later.

The 200,000 cfs reading at gauge 14105700 falls within the normal late-May range for this stretch of the Columbia. In strong snowpack years, flows at this gauge can exceed 300,000 to 400,000 cfs in May, making boat control difficult and pushing fish tight to structure. At 200,000 cfs the river is running at a moderate spring clip, which generally favors access and boat presentability.

No source in the current feeds provides a direct season-to-date catch comparison for the 2026 Columbia run. IFish.net Fishing Reports confirms angler activity at lower-river access points in recent weeks, consistent with normal seasonal timing, but no catch-rate data is available to judge whether this year is running ahead or behind prior seasons. In the absence of comparative Pacific Northwest-specific reporting, the most reliable benchmarks remain USGS gauge history and direct passage-count records from dam fish counters. If the current temperature and flow trajectory holds, the late-May window should remain fishable through at least early June before summer-steelhead conditions fully take over.