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The short answer
Sudden Lake was last stocked on September 24, 1980: 1,052 Westslope Cutthroat Trout (2 in avg).
County Missoula Species on record Westslope Cutthroat Trout Records 3 stocking events Official source Montana Fish, Wildlife & Parks report Location map
Sudden Lake location context Approximate · county context Beaverhead County Big Horn County Blaine County Broadwater County Carbon County Carter County Cascade County Chouteau County Custer County Daniels County Dawson County Deer Lodge County Fallon County Fergus County Flathead County Gallatin County Garfield County Glacier County Golden Valley County Granite County Hill County Jefferson County Judith Basin County Lake County Lewis and Clark County Liberty County Lincoln County Madison County McCone County Meagher County Mineral County Missoula County Musselshell County Park County Petroleum County Phillips County Pondera County Powder River County Powell County Prairie County Ravalli County Richland County Roosevelt County Rosebud County Sanders County Sheridan County Silver Bow County Stillwater County Sweet Grass County Teton County Toole County Treasure County Valley County Wheatland County Wibaux County Yellowstone County MT Sudden Lake, Missoula County Sudden Lake Harpers Lake, Missoula County Harpers Lake Missoula Kids Pond, Missoula County Missoula Kids Pond Frenchtown Pond, Missoula County Frenchtown Pond Beavertail Pond, Missoula County Beavertail Pond Cottonwood Lake, Middle, Missoula County Cottonwood Lake, Middle Placid Lake, Missoula County Placid Lake Holland Lake, Missoula County Holland Lake Lindbergh Lake, Missoula County Lindbergh Lake Missoula County
Pins use the finest location published with the stocking record. County-level pins show area context, not an exact access point; confirm access and directions with the official agency source.
Looking for a different Sudden Lake? Also on record: Sudden Lake (Ontonagon County, Michigan)
Agency records
Full stocking history Date Species Fish Size Hatchery September 24, 1980 Westslope Cutthroat Trout 1,052 2 in avg Creston National Fish Hatchery October 5, 1977 Westslope Cutthroat Trout 1,000 2 in avg Creston National Fish Hatchery August 20, 1974 Westslope Cutthroat Trout 989 1 in avg Creston National Fish Hatchery
Records shown exactly as published by Montana Fish, Wildlife & Parks. An event missing here does not mean the
water was not stocked - some plants go unreported or are published elsewhere.
Nearby stocked waters
Data source: Montana Fish, Wildlife & Parks .
Last updated: 2026-07-24 .
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