Columbia tributaries in prime window as spring Chinook run winds down

What's Biting

What's Next

At 57°F, the gauge reading on May 18 suggests this Columbia tributary is tracking close to seasonal norms for the third week of May — conditions that are neither too cold to suppress the bite nor warm enough to push fish into summer holdover patterns.

Over the next two to three days, water temperatures should trend modestly upward as late-spring daytime highs build. If flows remain near 1,200 cfs, expect relatively clear, manageable water — a scenario that typically benefits sight-presentations for bass and allows drift-fishing anglers to read seams and tailouts effectively for Chinook.

Spring Chinook, the marquee species on Columbia tributaries through May, are approaching the tail end of their annual run. Late-arriving fish will be holding in deeper, slower water during the heat of the day and pushing toward tributary mouths and staging areas at low light. The waxing crescent moon increases dawn and dusk feeding activity — plan entries around first light if Chinook are your primary target. Drift-fishing with cured roe or pulling plugs through tailouts at these windows has historically produced in this temperature range on Columbia tributaries.

Smallmouth bass across the Columbia system are likely in or just past their spawn at 57°F. As water temperatures creep toward the low 60s over the coming week, post-spawn females will begin moving off gravel beds and into adjacent current seams and deeper structure. Tactical Bassin's post-spawn bass coverage notes that smallmouth tend to school tightly after spawning — locating a feeding pod often produces multiple fish in quick succession. Finesse presentations and small swimbaits in the 3–4 inch range are go-to options along current edges and drop-offs.

American shad, an underrated fast-action target on the lower Columbia, typically crest accessible mainstem reaches in late May through June. If flows remain moderate and water continues to warm, shad should push into range within the next week or two. Light spinning gear with small shad darts is the classic approach once the push arrives.

Verify any emergency closures or retention-limit changes through WA WDFW Fishing Reports before heading out — late-spring regulations on Columbia tributaries can shift quickly based on in-season run assessments.

Context

Late May on Washington's Columbia tributaries and Puget Sound drainages sits at a well-defined seasonal pivot. Spring Chinook runs have historically crested on the Columbia mainstem in April and early May, with the tail of the run extending through the third week of May. At 57°F, the water temperature recorded at gauge 14113000 is tracking within normal range for this date — slightly below the mid-60s that typically define the transition to summer patterns, but consistent with productive late-spring conditions across this system.

The 1,200 cfs flow reading is moderate for a Columbia tributary in late May. Spring freshet flows driven by Cascade snowpack typically peak in April or early May, then taper toward summer baseflow levels through June. A reading near 1,200 cfs late in the month suggests the snowpack contribution is winding down, which generally brings improved water clarity and concentrates fish in predictable holding lies — a favorable development compared to the high, turbid conditions that can accompany peak runoff.

For Puget Sound–draining rivers, late May marks the transition between winter-spring steelhead opportunity and the early arrivals of summer-run fish. WA WDFW Fishing Reports documents hatchery stocking schedules across these systems, and hatchery rainbow trout provide supplemental opportunity on many smaller tributary streams during this window.

No specific season-over-season comparison data — charter reports, shop commentary, or state agency comparative analysis — appeared in the current intel feeds for this region. The assessment above reflects general seasonal patterns for the Columbia and Puget Sound drainages rather than a confirmed year-over-year trend. For a granular read on how 2026 is stacking up against recent springs, checking WA WDFW Fishing Reports' creel survey archive is the recommended next step.