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Montana stocking report

Flat Lake

79 records Last stocked: June 5, 2025

The short answer

Flat Lake was last stocked on June 5, 2025: 1,000 Rainbow Trout (7.03 in avg).

County
McCone
Species on record
Rainbow Trout, Northern Pike, Fathead Minnow, Largemouth Bass, Walleye
Records
79 stocking events
Official source
Montana Fish, Wildlife & Parks report

Location map

Flat 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 Flat Lake, McCone County Flat Lake Lisk Creek Reservoir, McCone County Lisk Creek Reservoir Nielsen Dam, McCone County Nielsen Dam Berreth Reservoir, McCone County Berreth Reservoir Dreyer Reservoir, McCone County Dreyer Reservoir Kwasney Reservoir, McCone County Kwasney Reservoir Skunkbrush Reservoir, McCone County Skunkbrush Reservoir Hedstrom Lake, McCone County Hedstrom Lake Quick Reservoir, McCone County Quick Reservoir McCone County
Flat LakeMcCone County Lisk Creek ReservoirMcCone County Nielsen DamMcCone County Berreth ReservoirMcCone County Dreyer ReservoirMcCone 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.

Agency records

Full stocking history

DateSpeciesFishSizeHatchery
June 5, 2025 Rainbow Trout 1,000 7.03 in avg Fort Peck Hatchery
June 27, 2024 Rainbow Trout 1,000 8.28 in avg Fort Peck Hatchery
July 14, 2023 Rainbow Trout 1,055 6.7 in avg Fort Peck Hatchery
May 24, 2022 Rainbow Trout 1,000 7.08 in avg Fort Peck Hatchery
May 19, 2021 Rainbow Trout 1,000 6.83 in avg Fort Peck Hatchery
May 26, 2020 Rainbow Trout 1,003 7.07 in avg Fort Peck Hatchery
June 7, 2019 Rainbow Trout 1,000 7.33 in avg Fort Peck Hatchery
June 13, 2018 Rainbow Trout 542 7.19 in avg Fort Peck Hatchery
October 31, 2017 Rainbow Trout 2,000 1.04 in avg Fort Peck Hatchery
June 1, 2017 Rainbow Trout 1,006 6.87 in avg Fort Peck Hatchery
May 18, 2016 Rainbow Trout 503 7.32 in avg Fort Peck Hatchery
May 18, 2016 Rainbow Trout 504 7.32 in avg Fort Peck Hatchery
May 11, 2015 Rainbow Trout 1,007 7.58 in avg Fort Peck Hatchery
May 27, 2014 Rainbow Trout 1,005 7.51 in avg Fort Peck Hatchery
June 18, 2013 Rainbow Trout 1,000 6.69 in avg Fort Peck Hatchery
May 21, 2012 Rainbow Trout 1,017 7.0200000000000005 in avg Fort Peck Hatchery
June 28, 2011 Rainbow Trout 1,000 7.4 in avg Fort Peck Hatchery
September 27, 2010 Rainbow Trout 452 7.0200000000000005 in avg Fort Peck Hatchery
May 4, 2006 Rainbow Trout 2,035 6.96 in avg Big Springs Trout Hatchery
June 3, 2004 Rainbow Trout 1,947 7.5 in avg Giant Springs Trout Hatchery
June 3, 2004 Rainbow Trout 1 5.9 in avg Big Springs Trout Hatchery
April 28, 2003 Rainbow Trout 2,072 6.8500000000000005 in avg Big Springs Trout Hatchery
May 30, 2001 Rainbow Trout 2,000 7 in avg Giant Springs Trout Hatchery
May 3, 2000 Rainbow Trout 2,002 7 in avg Big Springs Trout Hatchery
May 3, 1999 Rainbow Trout 1,998 7.7 in avg Big Springs Trout Hatchery
April 30, 1998 Rainbow Trout 952 7.5 in avg Big Springs Trout Hatchery
April 30, 1998 Rainbow Trout 1,300 7.3 in avg Big Springs Trout Hatchery
July 7, 1997 Rainbow Trout 800 8.3 in avg Big Springs Trout Hatchery
May 4, 1997 Rainbow Trout 3,009 7.3 in avg Big Springs Trout Hatchery
July 2, 1996 Rainbow Trout 1,988 9.4 in avg Big Springs Trout Hatchery
April 29, 1996 Rainbow Trout 3,150 7.2 in avg Big Springs Trout Hatchery
July 5, 1995 Rainbow Trout 1,000 9.5 in avg Big Springs Trout Hatchery
April 24, 1995 Rainbow Trout 1,512 7.9 in avg Big Springs Trout Hatchery
June 28, 1994 Rainbow Trout 1,500 9.200000000000001 in avg Big Springs Trout Hatchery
May 3, 1994 Rainbow Trout 1,496 8.1 in avg Big Springs Trout Hatchery
October 5, 1993 Rainbow Trout 1,498 6 in avg Big Springs Trout Hatchery
July 1, 1993 Rainbow Trout 1,000 9.6 in avg Big Springs Trout Hatchery
May 3, 1993 Rainbow Trout 1,508 7.7 in avg Big Springs Trout Hatchery
May 18, 1990 Northern Pike 9,000 1.5 in avg Miles City Fish Hatchery
May 10, 1990 Rainbow Trout 1,813 7.8 in avg Big Springs Trout Hatchery
May 9, 1989 Rainbow Trout 2,496 7.5 in avg Big Springs Trout Hatchery
May 5, 1988 Rainbow Trout 2,483 7.9 in avg Big Springs Trout Hatchery
May 6, 1987 Rainbow Trout 2,592 7.5 in avg Big Springs Trout Hatchery
June 3, 1986 Rainbow Trout 2,283 8 in avg Big Springs Trout Hatchery
May 29, 1985 Rainbow Trout 3,228 5 in avg Big Springs Trout Hatchery
May 29, 1985 Rainbow Trout 2,213 7 in avg Big Springs Trout Hatchery
May 17, 1985 Fathead Minnow 6,000 2 in avg Wild
September 13, 1984 Rainbow Trout 3,780 8 in avg Big Springs Trout Hatchery
July 15, 1982 Largemouth Bass 4,000 2 in avg Miles City - Federal
May 13, 1982 Rainbow Trout 4,002 8 in avg Big Springs Trout Hatchery
September 10, 1981 Rainbow Trout 1,790 9 in avg Big Springs Trout Hatchery
July 10, 1981 Largemouth Bass 2,500 2 in avg Miles City - Federal
April 16, 1981 Rainbow Trout 2,904 8 in avg Big Springs Trout Hatchery
August 28, 1980 Rainbow Trout 1,596 12 in avg Big Springs Trout Hatchery
May 1, 1980 Rainbow Trout 3,002 9 in avg Big Springs Trout Hatchery
October 3, 1979 Walleye 100 7 in avg Unknown
June 21, 1979 Walleye 3,000 1 in avg Miles City - Federal
May 22, 1979 Rainbow Trout 3,412 9 in avg Big Springs Trout Hatchery
October 12, 1978 Rainbow Trout 2,419 10 in avg Big Springs Trout Hatchery
May 25, 1978 Rainbow Trout 3,002 9 in avg Big Springs Trout Hatchery
September 15, 1977 Rainbow Trout 1,800 6 in avg Bluewater Springs Trout Hatchery
April 13, 1977 Rainbow Trout 2,002 8 in avg Big Springs Trout Hatchery
March 23, 1977 Rainbow Trout 5,000 2 in avg Miles City - Federal
September 27, 1976 Rainbow Trout 100 18 in avg Big Springs Trout Hatchery
September 27, 1976 Rainbow Trout 510 14 in avg Big Springs Trout Hatchery
May 17, 1976 Rainbow Trout 1,632 8 in avg Big Springs Trout Hatchery
April 14, 1976 Rainbow Trout 5,000 3 in avg Miles City - Federal
September 10, 1975 Rainbow Trout 279 16 in avg Big Springs Trout Hatchery
August 19, 1975 Rainbow Trout 714 10 in avg Big Springs Trout Hatchery
June 23, 1975 Rainbow Trout 5,000 5 in avg Miles City - Federal
June 12, 1975 Rainbow Trout 2,550 8 in avg Big Springs Trout Hatchery
September 5, 1974 Rainbow Trout 70 26 in avg Big Springs Trout Hatchery
September 4, 1974 Rainbow Trout 349 22 in avg Big Springs Trout Hatchery
June 24, 1974 Rainbow Trout 3,000 5 in avg Miles City - Federal
April 23, 1974 Rainbow Trout 2,040 8 in avg Big Springs Trout Hatchery
September 19, 1973 Rainbow Trout 571 16 in avg Big Springs Trout Hatchery
September 19, 1973 Rainbow Trout 5,304 8 in avg Big Springs Trout Hatchery
May 15, 1973 Rainbow Trout 2,142 9 in avg Big Springs Trout Hatchery
May 15, 1973 Rainbow Trout 5,200 3 in avg Big Springs Trout 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.

Data source: Montana Fish, Wildlife & Parks. Last updated: .

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