Columbia smallmouth prime time arrives as spring Chinook season winds down

What's Biting

What's Next

With water at 66°F and the First Quarter moon peaking on May 25, the next two to three days favor warm-water species far more than Chinook-targeted anglers.

For smallmouth bass, conditions are about as favorable as late May offers. Columbia mainstem fish are in or near the spawn at 66°F — bass in this temperature range are aggressive defenders of territory and quick to strike both out of reaction and territorial instinct. Post-spawn fish, as Tactical Bassin's swimbait and finesse coverage for big smallmouth in western clear-water fisheries underscores, shift rapidly to structure-oriented feeding along mid-river rock piles, current seams against canyon walls, and tailouts below the Columbia's mainstem dams. Wired 2 Fish's topwater breakdown notes that early mornings and late evenings create ideal feeding windows when fish stay active near shallow cover — plan your put-in for first light and expect the bite to taper by mid-morning as surface temperatures climb.

For spring Chinook anglers, realistic windows are narrowing with each passing day. The practical approach over the next several days is to target the first two hours of daylight when overnight cooling has softened the surface temperature slightly, focusing on deep slots, confluences with cold tributary inflow, and shaded canyon reaches where fish can hold comfortably. That said, at 66°F, retention-quality bites will be inconsistent at best. Verify current ODFW in-season rules before keeping any fish — emergency closures can arrive on short notice once mainstem temperatures hold above thermal thresholds.

American shad, which typically peak on the lower Columbia from mid-May through mid-June, should be running actively through this window. They concentrate around current seams and mid-river structure below dams, responding well to small weighted darts and shad-specific rigs on light spinning gear — a productive fallback if Chinook action stalls. The First Quarter moon can sharpen shad feeding activity near dawn and dusk, making early-morning sessions doubly worthwhile.

Summer steelhead entries on both the Columbia and Rogue remain weeks out by historical timing, though early-run fish occasionally appear in June. Use the remaining May days to lock in bass and shad numbers before steelhead season redirects the focus.

Context

Late May is traditionally the hinge point between the spring and summer fisheries on both the Columbia and Rogue systems, and a water temperature of 66°F as of May 24 places this season in a range that is typical-to-warm for this date.

On the Columbia, the spring Chinook fishery is usually winding toward its close by late May. Mainstem sport-fishing rules and retention windows often tighten as cumulative passage counts and temperature data come in — 66°F sits close to the thermal ceiling where salmon managers typically reduce or close retention to protect fish. Anglers who have followed past seasons know that the bite clock runs fast once river temps push past 65°F, and late-May closures or emergency restrictions are not unusual in warmer-than-average springs.

The Columbia's smallmouth bass population has expanded substantially in recent decades, particularly through the mid-river impoundments between McNary and Bonneville dams. Late May through early July has become the most productive window for large fish, coinciding with the spawn-to-post-spawn transition and peak forage availability. A reading of 66°F lands squarely in the temperature zone most often associated with the best topwater and swimbait action of the year on this stretch.

On the Rogue, spring Chinook historically peak from mid-April through mid-May in the Grant's Pass corridor and upstream. By late May, meaningful action typically shifts to the lower river as late-arriving fish push in and warming water slows upstream migration. Summer steelhead on the Rogue — one of the most storied summer runs in the Pacific Northwest — generally begin appearing in June, with the fishery building steadily through July and into fall.

None of the angler-intel feeds reviewed for this report included year-over-year comparisons specific to the Columbia-Rogue corridor, so a precise early, late, or on-schedule verdict is not available from current sources. The gauge data alone paints a seasonally normal-to-warm picture consistent with a mild spring year.