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Montana stocking report

Coopers Lake

104 records Last stocked: October 1, 2025

The short answer

Coopers Lake was last stocked on October 1, 2025: 4,000 Westslope Cutthroat Trout (5.7 in avg).

County
Powell
Species on record
Westslope Cutthroat Trout, Cutthroat Trout, Rainbow Trout
Records
104 stocking events
Official source
Montana Fish, Wildlife & Parks report

Location map

Coopers 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 Coopers Lake, Powell County Coopers Lake Browns Lake, Powell County Browns Lake Racetrack Pond, Powell County Racetrack Pond Penny Lake, Powell County Penny Lake Maddie Lake, Powell County Maddie Lake Bear Lake, Powell County Bear Lake Upsata Lake, Powell County Upsata Lake Nevada Reservoir, Powell County Nevada Reservoir Lena Lake, Powell County Lena Lake Powell County
Coopers LakePowell County Browns LakePowell County Racetrack PondPowell County Penny LakePowell County Maddie LakePowell 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
October 1, 2025 Westslope Cutthroat Trout 4,000 5.7 in avg Washoe Park Trout Hatchery
October 2, 2024 Westslope Cutthroat Trout 3,600 5.23 in avg Washoe Park Trout Hatchery
June 13, 2023 Westslope Cutthroat Trout 4,000 5.46 in avg Washoe Park Trout Hatchery
June 2, 2022 Westslope Cutthroat Trout 4,000 5.54 in avg Washoe Park Trout Hatchery
May 5, 2021 Westslope Cutthroat Trout 5,226 4.99 in avg Washoe Park Trout Hatchery
May 22, 2020 Westslope Cutthroat Trout 4,000 4.67 in avg Washoe Park Trout Hatchery
June 26, 2019 Westslope Cutthroat Trout 4,000 5.6000000000000005 in avg Washoe Park Trout Hatchery
June 4, 2018 Westslope Cutthroat Trout 4,000 4.84 in avg Washoe Park Trout Hatchery
June 8, 2017 Westslope Cutthroat Trout 4,000 5.23 in avg Washoe Park Trout Hatchery
June 2, 2016 Westslope Cutthroat Trout 4,000 4.92 in avg Washoe Park Trout Hatchery
June 9, 2015 Westslope Cutthroat Trout 4,000 4.3 in avg Washoe Park Trout Hatchery
June 16, 2014 Westslope Cutthroat Trout 4,000 4.63 in avg Washoe Park Trout Hatchery
June 11, 2013 Westslope Cutthroat Trout 4,000 5.43 in avg Washoe Park Trout Hatchery
June 19, 2012 Westslope Cutthroat Trout 3,600 5.9 in avg Washoe Park Trout Hatchery
June 28, 2011 Westslope Cutthroat Trout 4,000 5 in avg Washoe Park Trout Hatchery
June 23, 2010 Westslope Cutthroat Trout 4,000 6 in avg Washoe Park Trout Hatchery
June 2, 2009 Westslope Cutthroat Trout 3,600 5 in avg Washoe Park Trout Hatchery
September 9, 2008 Westslope Cutthroat Trout 4,000 2.11 in avg Washoe Park Trout Hatchery
June 24, 2008 Westslope Cutthroat Trout 300 14 in avg Washoe Park Trout Hatchery
June 11, 2007 Westslope Cutthroat Trout 4,000 5.34 in avg Washoe Park Trout Hatchery
June 14, 2006 Westslope Cutthroat Trout 3,600 5.59 in avg Washoe Park Trout Hatchery
June 7, 2005 Westslope Cutthroat Trout 4,000 5.3 in avg Washoe Park Trout Hatchery
June 11, 2004 Westslope Cutthroat Trout 4,000 5.76 in avg Washoe Park Trout Hatchery
June 24, 2003 Westslope Cutthroat Trout 250 15.8 in avg Washoe Park Trout Hatchery
June 17, 2003 Westslope Cutthroat Trout 4,000 5.3 in avg Washoe Park Trout Hatchery
May 31, 2000 Westslope Cutthroat Trout 10,000 3.7 in avg Washoe Park Trout Hatchery
June 7, 1999 Westslope Cutthroat Trout 10,000 3.2 in avg Washoe Park Trout Hatchery
June 6, 1998 Westslope Cutthroat Trout 10,000 3.8000000000000003 in avg Washoe Park Trout Hatchery
June 11, 1997 Westslope Cutthroat Trout 10,010 3 in avg Washoe Park Trout Hatchery
July 1, 1996 Westslope Cutthroat Trout 10,000 4 in avg Washoe Park Trout Hatchery
April 20, 1995 Westslope Cutthroat Trout 9,956 3.6 in avg Washoe Park Trout Hatchery
June 2, 1994 Westslope Cutthroat Trout 7,462 3.2 in avg Washoe Park Trout Hatchery
June 28, 1993 Westslope Cutthroat Trout 10,000 3.1 in avg Washoe Park Trout Hatchery
June 5, 1992 Westslope Cutthroat Trout 10,020 3.5 in avg Murray Springs Trout Hatchery
June 6, 1991 Westslope Cutthroat Trout 9,460 4.1 in avg Murray Springs Trout Hatchery
August 1, 1990 Westslope Cutthroat Trout 10,030 4.1 in avg Washoe Park Trout Hatchery
July 13, 1989 Westslope Cutthroat Trout 10,019 3.9 in avg Washoe Park Trout Hatchery
July 7, 1988 Westslope Cutthroat Trout 10,004 4.2 in avg Washoe Park Trout Hatchery
June 11, 1987 Westslope Cutthroat Trout 10,030 3.5 in avg Washoe Park Trout Hatchery
July 9, 1986 Westslope Cutthroat Trout 9,765 3 in avg Washoe Park Trout Hatchery
June 10, 1985 Westslope Cutthroat Trout 9,720 5 in avg Washoe Park Trout Hatchery
June 13, 1984 Westslope Cutthroat Trout 10,000 4 in avg Washoe Park Trout Hatchery
June 29, 1983 Westslope Cutthroat Trout 10,302 4 in avg Washoe Park Trout Hatchery
June 21, 1982 Westslope Cutthroat Trout 10,258 5 in avg Washoe Park Trout Hatchery
May 19, 1981 Westslope Cutthroat Trout 10,005 4 in avg Washoe Park Trout Hatchery
May 30, 1980 Westslope Cutthroat Trout 10,011 4 in avg Washoe Park Trout Hatchery
May 30, 1979 Westslope Cutthroat Trout 10,500 4 in avg Washoe Park Trout Hatchery
May 12, 1978 Westslope Cutthroat Trout 9,975 4 in avg Washoe Park Trout Hatchery
June 2, 1977 Westslope Cutthroat Trout 9,960 5 in avg Washoe Park Trout Hatchery
May 19, 1976 Westslope Cutthroat Trout 10,005 4 in avg Washoe Park Trout Hatchery
June 12, 1975 Westslope Cutthroat Trout 9,984 4 in avg Washoe Park Trout Hatchery
June 28, 1974 Westslope Cutthroat Trout 650 11 in avg Jocko River Trout Hatchery
June 24, 1974 Westslope Cutthroat Trout 2,100 11 in avg Jocko River Trout Hatchery
June 21, 1974 Westslope Cutthroat Trout 3,977 9 in avg Jocko River Trout Hatchery
June 3, 1974 Westslope Cutthroat Trout 2,590 9 in avg Jocko River Trout Hatchery
May 30, 1974 Westslope Cutthroat Trout 10,050 4 in avg Washoe Park Trout Hatchery
May 18, 1971 Westslope Cutthroat Trout 4,340 2 in avg Washoe Park Trout Hatchery
September 1, 1970 Westslope Cutthroat Trout 843 8 in avg Jocko River Trout Hatchery
September 30, 1969 Westslope Cutthroat Trout 546 15 in avg Jocko River Trout Hatchery
June 10, 1969 Cutthroat Trout 2,500 6 in avg Flathead Lake Salmon Hatchery
June 6, 1969 Cutthroat Trout 2,500 5 in avg Flathead Lake Salmon Hatchery
June 5, 1969 Cutthroat Trout 2,500 5 in avg Flathead Lake Salmon Hatchery
June 4, 1969 Cutthroat Trout 2,500 5 in avg Flathead Lake Salmon Hatchery
July 25, 1956 Cutthroat Trout 20,786 Washoe Park Trout Hatchery
August 2, 1955 Cutthroat Trout 16,100 Washoe Park Trout Hatchery
June 2, 1953 Rainbow Trout 840 Washoe Park Trout Hatchery
June 26, 1952 Rainbow Trout 1,500 6 in avg Washoe Park Trout Hatchery
July 12, 1951 Rainbow Trout 4,480 4 in avg Washoe Park Trout Hatchery
June 12, 1950 Rainbow Trout 4,944 6 in avg Washoe Park Trout Hatchery
July 26, 1949 Cutthroat Trout 2,400 5 in avg Washoe Park Trout Hatchery
May 24, 1949 Cutthroat Trout 3,460 5 in avg Jocko River Trout Hatchery
May 23, 1949 Rainbow Trout 4,760 4 in avg Washoe Park Trout Hatchery
August 31, 1948 Rainbow Trout 8,640 6 in avg Jocko River Trout Hatchery
August 14, 1948 Rainbow Trout 6,000 2 in avg Ovando
July 1, 1947 Rainbow Trout 1,760 5 in avg Washoe Park Trout Hatchery
July 23, 1946 Rainbow Trout 2,500 6 in avg Washoe Park Trout Hatchery
July 6, 1946 Rainbow Trout 1,500 6 in avg Washoe Park Trout Hatchery
July 12, 1945 Rainbow Trout 2,000 5 in avg Washoe Park Trout Hatchery
September 22, 1944 Cutthroat Trout 20,300 2 in avg Ovando
May 30, 1944 Rainbow Trout 9,000 3 in avg Washoe Park Trout Hatchery
October 17, 1943 Cutthroat Trout 16,600 2 in avg Ovando
June 26, 1943 Rainbow Trout 2,500 3 in avg Washoe Park Trout Hatchery
June 24, 1943 Rainbow Trout 2,700 3 in avg Washoe Park Trout Hatchery
June 27, 1942 Rainbow Trout 3,000 4 in avg Washoe Park Trout Hatchery
June 20, 1942 Rainbow Trout 11,000 2 in avg Ovando
June 19, 1942 Rainbow Trout 11,000 2 in avg Ovando
September 10, 1941 Rainbow Trout 8,400 Ovando
September 10, 1941 Cutthroat Trout 39,100 Ovando
September 9, 1941 Rainbow Trout 43,680 Ovando
September 1, 1940 Cutthroat Trout 10,000 Ovando
September 7, 1939 Cutthroat Trout 20,600 Ovando
August 26, 1938 Rainbow Trout 3,000 4 in avg Washoe Park Trout Hatchery
August 25, 1938 Rainbow Trout 3,000 4 in avg Washoe Park Trout Hatchery
August 24, 1938 Rainbow Trout 3,000 4 in avg Washoe Park Trout Hatchery
August 23, 1938 Rainbow Trout 3,000 4 in avg Washoe Park Trout Hatchery
October 29, 1937 Rainbow Trout 12,000 Washoe Park Trout Hatchery
September 22, 1937 Cutthroat Trout 18,800 3 in avg Ovando
July 19, 1937 Cutthroat Trout 3,000 4 in avg Washoe Park Trout Hatchery
July 17, 1937 Cutthroat Trout 3,000 4 in avg Washoe Park Trout Hatchery
July 16, 1937 Cutthroat Trout 3,000 4 in avg Washoe Park Trout Hatchery
July 15, 1937 Cutthroat Trout 3,000 4 in avg Washoe Park Trout Hatchery
July 14, 1937 Cutthroat Trout 3,000 4 in avg Washoe Park Trout Hatchery
September 21, 1936 Cutthroat Trout 20,496 Ovando
September 21, 1936 Cutthroat Trout 20,496 Ovando

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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