Lake Michigan salmon season peaks as smallmouth push the Grand River mouth

What's Biting

What's Next

The new moon (June 14) sets up one of the better low-light windows of the month. Dawn and dusk feeding activity tends to intensify in the days immediately surrounding a new moon, making early-morning and early-evening runs on both the lake and the river mouth worth prioritizing over midday when sun angle flattens the bite.

With the Grand River flowing at 3,460 cfs, the outflow plume at the Lake Michigan shoreline is creating a temperature and clarity gradient that concentrates baitfish near the seam. If flows hold steady or ease slightly over the next 48–72 hours — as is typical after late-spring precipitation clears upstream — that transition zone between warmer, stained river water and cooler open lake should remain a productive trolling corridor for both salmon species. Per the WI DNR Lake Michigan Fishing Report, the broader lake carries strong salmon cohorts supported by healthy alewife forage; anglers targeting Chinook should probe the 60–100 foot zone with downriggers, while coho are typically found shallower in June and may stage tight to the plume edge.

For smallmouth, the post-spawn transition is underway in mid-June. Fish are moving off spawning flats and into current seams, rocky points, and deeper drop-offs near the river mouth. Tactical Bassin's Great Lakes coverage confirms quality bass on windy, choppy days using swimbait presentations — the Dark Sleeper worked slow along the bottom and the Spark Shad retrieved as a reaction bait are productive when wave action builds. Morning and evening windows will consistently outperform glassy midday conditions.

Walleye are a reliable mid-June presence at Great Lakes river-mouth transition zones, typically holding near bottom structure on the inside edges of the plume. Bottom-contact jigs tipped with crawlers are the standard approach for this seasonal pattern. Check the USGS gauge and local weather before launching — conditions on Lake Michigan can shift quickly in June, and wave height should always factor into offshore planning.

Context

June sits at the hinge point of the Michigan fishing calendar. The spring-focused steelhead and brown trout runs that attract fly and drift anglers to the Grand River typically wind down by late May to early June, yielding the water column to the summer trolling season that dominates Lake Michigan through August. By the second week of June that transition is well underway, and the river mouth shifts from a steelhead corridor to a salmon and bass staging zone.

The Grand River at Grand Rapids (USGS gauge 04119000) usually sees its flood-stage peaks in March and April, then grades toward summer base flows — commonly in the 1,500–2,500 cfs range — by mid-June. The current 3,460 cfs reading is modestly elevated for this point in the season, suggesting residual spring runoff or recent upstream rainfall is still working through the watershed. That said, it remains well within fishable range and represents normal inter-year variability, not a condition that should deter anglers.

The larger seasonal backdrop on Lake Michigan is an encouraging one. The WI DNR Lake Michigan Fishing Report put 2024 in the record books for coho (more than 210,000 harvested, an all-time high) and noted Chinook totals not seen since 2012, both outcomes linked directly to strong alewife year classes. When alewives are abundant, lake-stocked Chinook and coho survive at higher rates and remain in the water column longer rather than moving into rivers ahead of schedule. Mid-June trolling on the open lake typically benefits from exactly this dynamic, and the 2026 fishery inherits that favorable prey-base condition.

Smallmouth bass near the Grand River mouth follow a predictable seasonal arc: spawning concludes by late May on most years, and mid-June typically finds fish transitioning into active early-summer feeding on current-swept structure — consistent with what Tactical Bassin observed across the broader Great Lakes smallmouth fishery. Direct week-specific comparisons from Michigan state-agency sources were not available in this reporting cycle, so current-year deviation from typical patterns cannot be confirmed; seasonal timing appears on-schedule.