Regional spawn calendar
Mountain West / Rockies Trout Waters spawn calendar.
7 species with documented spawn timing in Mountain West / Rockies Trout Waters. Spawn timing is driven by water temperature — these calendar windows reflect the typical years when water reaches each species' threshold.
Spawning now — June
- Largemouth BassLate May – Late 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…
- WalleyeMid-April – Early June
Spawn-run walleye in dam tailwaters concentrate in small areas and are exceptionally vulnerable to harvest pressure. Many states impose closed seasons or slot limits during spawn; …
- Rainbow TroutLate April – Late June
Wild rainbow redds are vulnerable to wading damage — anglers should walk around (not through) gravel riffles during spawn season. Redd disturbance kills incubating eggs. Many wild …
- Cutthroat TroutLate April – Late June
Many cutthroat subspecies are protected by C&R-only or limited harvest regulations year-round. Native cutthroat conservation is one of the most active fisheries restoration efforts…
All species
Mountain West / Rockies Trout Waters spawn windows.
- Largemouth BassMicropterus salmoidesTypical window: Late May – Late JuneTypical window: Late May – Late June
Mountain reservoir bass spawn delayed by elevation and cold water.
- WalleyeSander vitreusTypical window: Mid-April – Early JuneTypical window: Mid-April – Early June
Mountain reservoir walleye spawn delayed by elevation.
- Northern PikeEsox luciusTypical window: Mid-April – Mid-MayTypical window: Mid-April – Mid-May
Mountain pike waters spawn later due to ice persistence.
- Rainbow TroutOncorhynchus mykissTypical window: Late April – Late JuneTypical window: Late April – Late June
Mountain West wild rainbow streams peak in May–June; ice-out and runoff dependent.
- Brown TroutSalmo truttaTypical window: Mid-October – Late NovemberTypical window: Mid-October – Late November
Mountain West browns (Madison, Yellowstone) peak late October–November.
- Lake TroutSalvelinus namaycushTypical window: Mid-October – Mid-NovemberTypical window: Mid-October – Mid-November
Mountain West deep lakes peak late October–early November.
- Cutthroat TroutOncorhynchus clarkiiTypical window: Late April – Late JuneTypical window: Late April – Late June
Yellowstone, Snake River, Colorado River cutthroat subspecies peak May–June.
Mountain West / Rockies Trout Waters 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.
Start free trial →