Early-June salmon staging and post-spawn bass at the Grand River mouth

What's Biting

What's Next

At 3,020 cfs, the Grand River is pushing a moderate spring plume into Lake Michigan. This current boundary acts as a baitfish and predator aggregation zone, where alewives and other forage concentrate along the thermal edges of the plume, drawing in both early-staging salmon and active brown trout. If flows begin dropping over the coming days, as is typical in early June once snowmelt subsides, water clarity at the mouth should improve, making spoon and stick-bait presentations increasingly effective.

For salmon, the first week of June is early for the main Chinook push but right on schedule for pre-staging activity. Fish are likely suspending in the upper water column near the river mouth, keying on emerging alewife concentrations. Trolling spoons and stickbaits in the top 15 to 20 feet of water covers the most productive zone at this stage. With the strong 2024 cohorts documented by the WI DNR still adding weight, we're looking at a run of heavier fish than the lake has seen in over a decade, an encouraging sign for the early-June window.

Post-spawn smallmouth bass are the most accessible target right now for anglers without a boat capable of trolling big water. Tactical Bassin's June playbook highlights drop shots and chatterbaits fished around isolated offshore structure as the standout approach, with fish actively feeding to recover energy reserves after the spawn. Rocky transition points and gravel-to-sand flats near the river mouth are textbook holding areas. The waning gibbous moon phase supports early morning and late evening feeding windows. Plan to be on the water at dawn for the best shallow bite before fish drop to mid-depth structure by midday.

Without a weather forecast in this cycle's data, check local conditions before launching. Light southwest winds typically dirty up the nearshore zone and push baitfish deeper; in those conditions, vertical jigging offshore will outperform shallow presentations. Watch for calm mornings as the primary window to work the plume edges effectively.

Context

Early June on Lake Michigan's eastern shore marks the transition between the spring steelhead season (which peaks March through May) and the summer salmon run. The Grand River mouth is one of the premier staging areas on the eastern Lake Michigan shore, historically drawing significant charter activity from mid-June through September as Chinook and coho begin their pre-spawn migration toward tributary entrances.

The most directly relevant benchmark in this report's feeds comes from the WI DNR Lake Michigan Fishing Report, which documented 2024 season totals: more than 210,000 coho (a record) and over 160,000 Chinook, the highest harvest since 2012. Both figures were attributed to strong recent stocking classes and a recovering alewife forage base. Those fish are now a season older and heavier, and the 2025 stocking cohorts are entering the lake as active feeders. By most historical measures, the Lake Michigan salmon fishery enters 2026 in unusually strong shape, which makes the early-June staging window worth prioritizing this year.

Typical early-June conditions at the Grand River mouth include nearshore water temperatures in the upper 40s to mid-50s degrees Fahrenheit: cool enough that salmon venture relatively shallow before warm surface temps push them to the thermocline in July. Anglers who target the first three weeks of June with near-surface trolling have historically found this the most accessible window of the season before fish become thermocline-dependent and require downrigger depths to reach consistently.

For smallmouth bass, early June is broadly one of the top action windows of the year across the Great Lakes region, as post-spawn fish are aggressive feeders replenishing energy. No specific 2026 comparative data for the Grand River mouth was available in this report cycle's feeds, so the seasonal baseline is the best guide available this week.