Regional spawn calendar
Midwest Rivers and Natural Lakes spawn calendar.
18 species with documented spawn timing in Midwest Rivers and Natural Lakes. Spawn timing is driven by water temperature — these calendar windows reflect the typical years when water reaches each species' threshold.
Spawning now — June
- Largemouth BassMid-April – Early June
Bedding largemouth bass are highly vulnerable to angling stress — they are physiologically committed to nest defense and will continue to attack lures even when exhausted. Catch an…
- Smallmouth BassMid-May – Late June
Smallmouth bass nest abandonment causes complete egg/fry mortality from invertebrate predation within hours. Repeated catch and release of nest-guarding males during peak spawn can…
- Black CrappieMid-April – Mid-June
Crappie are highly catchable during spawn — visible bedding fish in 1–3 ft of water are easy to target. Many anglers practice voluntary harvest restraint during peak spawn weeks; s…
- Channel CatfishMid-June – Mid-August
Channel catfish reproduce successfully in most waters and populations are robust. No widespread spawn-period closures.…
- Flathead CatfishMid-June – Mid-July
Trophy flatheads (50+ lbs) take 15–25 years to grow. Conservation-minded anglers practice C&R for trophy fish year-round.…
All species
Midwest Rivers and Natural Lakes spawn windows.
- Largemouth BassMicropterus salmoidesTypical window: Mid-April – Early JuneTypical window: Mid-April – Early June
Driftless region and northern Midwest waters peak May.
- Smallmouth BassMicropterus dolomieuTypical window: Mid-May – Late JuneTypical window: Mid-May – Late June
Driftless region and northern Midwest streams peak in June.
- Spotted BassMicropterus punctulatusTypical window: Mid-April – Late MayTypical window: Mid-April – Late May
Ohio River and tributaries peak May.
- WalleyeSander vitreusTypical window: Mid-April – Mid-MayTypical window: Mid-April – Mid-May
Mille Lacs, Leech Lake, Mississippi River pool walleye peak May.
- SaugerSander canadensisTypical window: Late March – Late AprilTypical window: Late March – Late April
Mississippi River pool sauger peak April.
- Northern PikeEsox luciusTypical window: Late March – Late AprilTypical window: Late March – Late April
Minnesota and Wisconsin natural lakes peak in early April after ice-out.
- MuskellungeEsox masquinongyTypical window: Mid-April – Late MayTypical window: Mid-April – Late May
Wisconsin Northwoods muskie spawn classic — peak in early to mid-May.
- Yellow PerchPerca flavescensTypical window: Late March – Mid-MayTypical window: Late March – Mid-May
Northern Midwest natural lakes peak shortly after ice-out, often April.
- BluegillLepomis macrochirusTypical window: Late May – Late JulyTypical window: Late May – Late July
Midwest natural lakes peak in June.
- Black CrappiePomoxis nigromaculatusTypical window: Mid-April – Mid-JuneTypical window: Mid-April – Mid-June
Northern Midwest natural lakes peak in mid- to late May.
- White CrappiePomoxis annularisTypical window: Mid-April – Late MayTypical window: Mid-April – Late May
Midwest reservoirs peak May.
- Channel CatfishIctalurus punctatusTypical window: Mid-June – Mid-AugustTypical window: Mid-June – Mid-August
Midwest waters peak late June–July.
- Flathead CatfishPylodictis olivarisTypical window: Mid-June – Mid-JulyTypical window: Mid-June – Mid-July
Mississippi, Missouri, and Ohio rivers peak late June.
- Blue CatfishIctalurus furcatusTypical window: Late May – Late JulyTypical window: Late May – Late July
Mississippi and Missouri rivers peak June.
- White BassMorone chrysopsTypical window: Late March – Mid-MayTypical window: Late March – Mid-May
Mississippi River, Lake Erie tributaries peak April–May; Detroit River and Maumee River runs are iconic.
- Brown TroutSalmo truttaTypical window: Mid-October – Late NovemberTypical window: Mid-October – Late November
Driftless region wild brown streams peak November.
- Brook TroutSalvelinus fontinalisTypical window: Mid-September – Mid-NovemberTypical window: Mid-September – Mid-November
Driftless region brook trout streams peak October.
- Lake TroutSalvelinus namaycushTypical window: Mid-October – Late NovemberTypical window: Mid-October – Late November
Northern Minnesota and Wisconsin lakes peak November.
Midwest Rivers and Natural Lakes spawn alerts.
Bield: Fish ties USGS gauges in your area to species spawn thresholds — get notified the day water temperature hits pre-spawn for your target.
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