Columbia Basin Bass in Full Swing at Moses Lake, Potholes, and Banks Lake

What's Biting

What's Next

Over the next two to three days, the Yakima River flow of 2,950 cfs (USGS gauge 12484500, recorded June 13) may hold steady or ease slightly as Cascade snowmelt tapers toward its summer low. Wading the Yakima will remain challenging through the week; anglers with drift boats or pontoons will have a significant advantage. If flows drop and visibility improves by the weekend, nymph and dry fly opportunities should open up considerably. Field & Stream's trout temperature guide is worth bookmarking now: once water temps consistently push into the upper 60s, fish stress rises quickly and early-morning windows become critical for keeping fish healthy on the release.

The New Moon arrives today, June 14, and the absence of lunar brightness typically sharpens surface feeding for bass in the early morning and evening. This is an ideal weekend to be on Moses Lake, Potholes Reservoir, or Banks Lake. Outdoor Hub reports the full Columbia Basin tournament calendar is rolling, meaning fish are being located and patterns are established. Recreational anglers can piggyback on that intelligence: bass active enough to draw tournament fields tend to respond well to reaction baits along weed edges and rocky structure. Tactical Bassin's summer bass breakdown points to swing-head jigs and shaky head worms as reliable June producers for offshore bass, with shallow crankbaits working well early before fish push deeper with the midday sun.

Walleye across Banks Lake should be in their June groove, staged on mid-depth rock humps and transition zones. Bottom-bouncer rigs with live crawlers or shad-imitation swimbaits fished during low-light windows should connect well. The New Moon transition is historically one of the stronger walleye bites of the summer across the Columbia Basin system.

Keep drought conditions on your radar. Wired 2 Fish is documenting major fish kills at western reservoirs hit hardest by prolonged dry conditions, with San Carlos Lake in Arizona losing its entire fishery to falling water levels. Eastern Washington's major Columbia Basin impoundments are federally regulated and not at immediate risk, but smaller tributary lakes and off-river sloughs can see rapid mid-summer drawdowns. If you are fishing any smaller warmwater lake this week, check current water levels before launching and practice quick-release technique during the warmest afternoon hours.

Context

Mid-June sits at a familiar inflection point for Eastern Washington anglers. The Yakima River typically peaks in late May or early June from Cascade snowmelt and then begins a gradual decline toward summer low flows. A reading of 2,950 cfs at USGS gauge 12484500 near Ellensburg sits within the normal June range; the river commonly runs between 2,000 and 4,500 cfs at this time of year, depending on the winter's snowpack depth. No water temperature data is available from the gauge this cycle, but seasonal norms for mid-June typically place Yakima River temps in the upper 50s to low 60s Fahrenheit, generally still supportive of trout but trending toward the threshold where afternoon stress rises.

On the warmwater side, the Columbia Basin tournament calendar documented by Outdoor Hub reflects a well-established pattern. June through August is prime time for bass and walleye in the region's big reservoirs, and Moses Lake, Potholes Reservoir, and Banks Lake have historically hosted organized tournament events through the heart of summer. The 2026 calendar confirms that tradition is intact and the fisheries are healthy enough to draw competitive fields.

Hatch Magazine's seasonal guide for trout anglers navigating drought conditions notes that interior West rivers face increasingly compressed fishing windows as dry years arrive earlier and snowpack runs light. Eastern Washington shares some of that vulnerability. In lighter snowpack years the Yakima's summer low arrives sooner and water warms faster, tightening the productive trout window. No comparative snowpack signal is available in the current feeds, but the June 13 gauge reading does not suggest an abnormal situation at this point in the season.

Wired 2 Fish's reporting on reservoir fish kills in the broader West is a useful reminder that the warmwater fisheries of the Columbia Basin, while more insulated than most given federal regulation of reservoir levels, are not immune to sustained regional drought. Conditions are worth monitoring as summer deepens into July and August.