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Montana stocking report

Yellowtail Afterbay Reservoir

121 records Last stocked: May 6, 2026

The short answer

Yellowtail Afterbay Reservoir was last stocked on May 6, 2026: 6,239 Rainbow Trout (5.1000000000000005 in avg).

County
Big Horn
Species on record
Rainbow Trout, Yellowstone Cutthroat Trout, Walleye
Records
121 stocking events
Official source
Montana Fish, Wildlife & Parks report

Location map

Yellowtail Afterbay Reservoir 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 Yellowtail Afterbay Reservoir, Big Horn County Yellowtail Afterbay Reservo… Tongue River Reservoir, Big Horn County Tongue River Reservoir Rocky Ranch Interstate Pond, Big Horn County Rocky Ranch Interstate Pond Bighorn Lake, Big Horn County Bighorn Lake Arapooish Pond, Big Horn County Arapooish Pond Blue Creek Pond, Big Horn County Blue Creek Pond Brown Reservoir, Big Horn County Brown Reservoir East Fork Pond, Big Horn County East Fork Pond Hay Corral Pond, Big Horn County Hay Corral Pond Big Horn County
Yellowtail Afterbay ReservoirBig Horn County Tongue River ReservoirBig Horn County Rocky Ranch Interstate PondBig Horn County Bighorn LakeBig Horn County Arapooish PondBig Horn 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
May 6, 2026 Rainbow Trout 6,239 5.1000000000000005 in avg Bluewater Springs Trout Hatchery
April 2, 2025 Rainbow Trout 6,649 4.5 in avg Bluewater Springs Trout Hatchery
April 1, 2025 Rainbow Trout 8,311 4.3 in avg Bluewater Springs Trout Hatchery
May 7, 2024 Rainbow Trout 10,173 4.65 in avg Bluewater Springs Trout Hatchery
May 10, 2023 Rainbow Trout 12,970 4.65 in avg Bluewater Springs Trout Hatchery
May 10, 2021 Rainbow Trout 14,960 4.41 in avg Bluewater Springs Trout Hatchery
August 12, 2020 Yellowstone Cutthroat Trout 6,580 2.95 in avg Yellowstone River Trout Hatchery
May 13, 2020 Rainbow Trout 18,166 4.2 in avg Bluewater Springs Trout Hatchery
May 15, 2019 Rainbow Trout 20,880 4.57 in avg Bluewater Springs Trout Hatchery
May 7, 2018 Rainbow Trout 23,582 4.12 in avg
May 7, 2018 Rainbow Trout 23,582 4.12 in avg Bluewater Springs Trout Hatchery
October 4, 2017 Rainbow Trout 952 5.4 in avg Bluewater Springs Trout Hatchery
August 8, 2017 Rainbow Trout 10,611 7.26 in avg Bluewater Springs Trout Hatchery
August 7, 2017 Rainbow Trout 12,646 6.92 in avg Bluewater Springs Trout Hatchery
April 29, 2016 Rainbow Trout 26,432 4.05 in avg Bluewater Springs Trout Hatchery
October 6, 2015 Rainbow Trout 10,410 5.0600000000000005 in avg Bluewater Springs Trout Hatchery
May 11, 2015 Rainbow Trout 31,552 4.18 in avg Bluewater Springs Trout Hatchery
May 27, 2014 Rainbow Trout 30,566 4.41 in avg Bluewater Springs Trout Hatchery
May 1, 2013 Rainbow Trout 31,025 3.89 in avg Bluewater Springs Trout Hatchery
July 18, 2012 Walleye 36,692 2.37 in avg
July 17, 2012 Walleye 90,792 2.37 in avg
May 2, 2011 Rainbow Trout 23,021 4.15 in avg Bluewater Springs Trout Hatchery
May 17, 2010 Rainbow Trout 28,638 4.32 in avg Bluewater Springs Trout Hatchery
June 20, 2008 Rainbow Trout 11,647 5.92 in avg Bluewater Springs Trout Hatchery
June 18, 2008 Rainbow Trout 13,668 5.71 in avg Bluewater Springs Trout Hatchery
June 12, 2007 Rainbow Trout 22,759 4.5600000000000005 in avg Bluewater Springs Trout Hatchery
June 6, 2005 Rainbow Trout 25,275 4.34 in avg Bluewater Springs Trout Hatchery
June 2, 2004 Rainbow Trout 25,525 4.01 in avg Bluewater Springs Trout Hatchery
October 29, 2003 Rainbow Trout 4,149 9.03 in avg Bluewater Springs Trout Hatchery
October 29, 2003 Rainbow Trout 5,092 8.66 in avg Bluewater Springs Trout Hatchery
October 28, 2003 Rainbow Trout 4,960 8.620000000000001 in avg Bluewater Springs Trout Hatchery
October 27, 2003 Rainbow Trout 5,329 8.64 in avg Bluewater Springs Trout Hatchery
October 2, 2002 Rainbow Trout 5,188 7.7 in avg Bluewater Springs Trout Hatchery
September 27, 2002 Rainbow Trout 6,256 7.9 in avg Bluewater Springs Trout Hatchery
September 27, 2002 Rainbow Trout 8,629 7.6000000000000005 in avg Bluewater Springs Trout Hatchery
October 25, 2000 Rainbow Trout 16,100 5.63 in avg Big Springs Trout Hatchery
August 18, 1999 Rainbow Trout 7,125 7.9 in avg Bluewater Springs Trout Hatchery
August 17, 1999 Rainbow Trout 7,751 7.7 in avg Bluewater Springs Trout Hatchery
August 16, 1999 Rainbow Trout 5,973 7.8 in avg Bluewater Springs Trout Hatchery
August 19, 1998 Rainbow Trout 7,068 7.9 in avg Bluewater Springs Trout Hatchery
August 17, 1998 Rainbow Trout 6,477 7.9 in avg Bluewater Springs Trout Hatchery
August 17, 1998 Rainbow Trout 7,104 7.9 in avg Bluewater Springs Trout Hatchery
August 13, 1997 Rainbow Trout 7,191 8.1 in avg Bluewater Springs Trout Hatchery
August 12, 1997 Rainbow Trout 7,420 7.5 in avg Bluewater Springs Trout Hatchery
August 11, 1997 Rainbow Trout 6,630 7.9 in avg Bluewater Springs Trout Hatchery
August 14, 1996 Rainbow Trout 7,907 8.2 in avg Bluewater Springs Trout Hatchery
August 12, 1996 Rainbow Trout 6,634 8.2 in avg Bluewater Springs Trout Hatchery
August 12, 1996 Rainbow Trout 6,765 8.1 in avg Bluewater Springs Trout Hatchery
August 31, 1995 Rainbow Trout 6,132 8.1 in avg Bluewater Springs Trout Hatchery
August 30, 1995 Rainbow Trout 5,941 8.1 in avg Bluewater Springs Trout Hatchery
August 29, 1995 Rainbow Trout 6,179 8.1 in avg Bluewater Springs Trout Hatchery
August 4, 1994 Rainbow Trout 9,988 4.8 in avg Big Springs Trout Hatchery
May 2, 1994 Rainbow Trout 19,890 4 in avg Bluewater Springs Trout Hatchery
October 21, 1993 Rainbow Trout 4,900 5.9 in avg Bluewater Springs Trout Hatchery
April 22, 1993 Rainbow Trout 20,156 4.5 in avg Bluewater Springs Trout Hatchery
May 11, 1992 Rainbow Trout 20,025 4 in avg Bluewater Springs Trout Hatchery
May 21, 1991 Rainbow Trout 20,213 4.5 in avg Bluewater Springs Trout Hatchery
June 20, 1990 Rainbow Trout 19,553 4.9 in avg Bluewater Springs Trout Hatchery
July 19, 1989 Rainbow Trout 21,903 4.3 in avg Bluewater Springs Trout Hatchery
July 15, 1988 Rainbow Trout 21,977 4 in avg Bluewater Springs Trout Hatchery
July 30, 1987 Rainbow Trout 19,200 4 in avg Big Springs Trout Hatchery
August 18, 1986 Rainbow Trout 16,408 4 in avg Big Springs Trout Hatchery
April 8, 1985 Rainbow Trout 10,040 7 in avg Bluewater Springs Trout Hatchery
April 2, 1985 Rainbow Trout 4,794 8 in avg Bluewater Springs Trout Hatchery
April 1, 1985 Rainbow Trout 5,400 8 in avg Bluewater Springs Trout Hatchery
November 14, 1984 Rainbow Trout 16,000 5 in avg Bluewater Springs Trout Hatchery
November 13, 1984 Rainbow Trout 24,000 5 in avg Bluewater Springs Trout Hatchery
April 19, 1984 Rainbow Trout 164 15 in avg Big Springs Trout Hatchery
April 19, 1984 Rainbow Trout 200 15 in avg Big Springs Trout Hatchery
April 18, 1984 Rainbow Trout 240 15 in avg Big Springs Trout Hatchery
April 17, 1984 Rainbow Trout 200 15 in avg Big Springs Trout Hatchery
April 16, 1984 Rainbow Trout 160 15 in avg Big Springs Trout Hatchery
April 16, 1984 Rainbow Trout 120 15 in avg Big Springs Trout Hatchery
October 22, 1983 Rainbow Trout 27,610 5 in avg Bluewater Springs Trout Hatchery
May 6, 1983 Rainbow Trout 9,900 4 in avg Bluewater Springs Trout Hatchery
June 10, 1982 Rainbow Trout 14,805 5 in avg Bluewater Springs Trout Hatchery
June 9, 1982 Rainbow Trout 25,200 5 in avg Bluewater Springs Trout Hatchery
October 21, 1981 Rainbow Trout 5,100 8 in avg Bluewater Springs Trout Hatchery
May 5, 1981 Rainbow Trout 40,200 3 in avg Bluewater Springs Trout Hatchery
May 27, 1980 Rainbow Trout 40,700 4 in avg Bluewater Springs Trout Hatchery
July 2, 1979 Rainbow Trout 11,195 6 in avg Bluewater Springs Trout Hatchery
June 26, 1979 Rainbow Trout 20,655 5 in avg Bluewater Springs Trout Hatchery
May 17, 1979 Rainbow Trout 40,800 4 in avg Bluewater Springs Trout Hatchery
May 26, 1978 Rainbow Trout 40,255 4 in avg Bluewater Springs Trout Hatchery
November 1, 1977 Rainbow Trout 7,700 8 in avg Bluewater Springs Trout Hatchery
April 6, 1977 Rainbow Trout 40,800 5 in avg Bluewater Springs Trout Hatchery
November 10, 1976 Rainbow Trout 49,875 3 in avg Bluewater Springs Trout Hatchery
May 10, 1976 Rainbow Trout 42,775 4 in avg Bluewater Springs Trout Hatchery
November 17, 1975 Rainbow Trout 30,400 2 in avg Bluewater Springs Trout Hatchery
July 8, 1975 Rainbow Trout 5,200 5 in avg Bluewater Springs Trout Hatchery
April 10, 1975 Rainbow Trout 20,730 5 in avg Bluewater Springs Trout Hatchery
April 3, 1975 Rainbow Trout 20,008 5 in avg Bluewater Springs Trout Hatchery
March 25, 1974 Rainbow Trout 40,040 4 in avg Bluewater Springs Trout Hatchery
April 17, 1973 Rainbow Trout 40,000 4 in avg Bluewater Springs Trout Hatchery
September 13, 1972 Rainbow Trout 3,000 6 in avg Washoe Park Trout Hatchery
September 13, 1972 Yellowstone Cutthroat Trout 3,000 3 in avg Bluewater Springs Trout Hatchery
July 5, 1972 Rainbow Trout 35,000 4 in avg Bluewater Springs Trout Hatchery
June 23, 1972 Rainbow Trout 62,400 3 in avg Bluewater Springs Trout Hatchery
June 1, 1972 Rainbow Trout 25,704 5 in avg Bluewater Springs Trout Hatchery
June 1, 1972 Rainbow Trout 16,800 5 in avg Bluewater Springs Trout Hatchery
March 4, 1972 Rainbow Trout 49,280 4 in avg Bluewater Springs Trout Hatchery
November 8, 1971 Yellowstone Cutthroat Trout 23,000 5 in avg Yellowstone River Trout Hatchery
November 4, 1971 Yellowstone Cutthroat Trout 19,200 5 in avg Yellowstone River Trout Hatchery
August 19, 1971 Rainbow Trout 5,661 8 in avg Bluewater Springs Trout Hatchery
August 6, 1971 Rainbow Trout 4,268 8 in avg Bluewater Springs Trout Hatchery
June 30, 1971 Yellowstone Cutthroat Trout 10,080 3 in avg Yellowstone River Trout Hatchery
June 8, 1971 Yellowstone Cutthroat Trout 15,680 3 in avg Yellowstone River Trout Hatchery
June 2, 1971 Yellowstone Cutthroat Trout 22,400 3 in avg Yellowstone River Trout Hatchery
May 21, 1971 Rainbow Trout 14,400 5 in avg Bluewater Springs Trout Hatchery
April 9, 1971 Rainbow Trout 27,352 5 in avg Bluewater Springs Trout Hatchery
August 10, 1970 Rainbow Trout 9,800 6 in avg Bluewater Springs Trout Hatchery
July 20, 1970 Rainbow Trout 19,500 6 in avg Bluewater Springs Trout Hatchery
June 11, 1970 Rainbow Trout 11,950 4 in avg Miles City - Federal
June 11, 1970 Rainbow Trout 39,800 3 in avg Miles City - Federal
April 24, 1970 Rainbow Trout 32,760 4 in avg Bluewater Springs Trout Hatchery
March 21, 1969 Rainbow Trout 45,100 4 in avg Bluewater Springs Trout Hatchery
May 8, 1968 Rainbow Trout 44,100 4 in avg Bluewater Springs Trout Hatchery
October 6, 1967 Rainbow Trout 3,232 8 in avg Bluewater Springs Trout Hatchery
April 7, 1967 Rainbow Trout 20,160 3 in avg Bluewater Springs Trout Hatchery
May 5, 1966 Rainbow Trout 2,000 10 in avg Bluewater Springs Trout Hatchery
May 5, 1966 Rainbow Trout 18,000 4 in avg Bluewater 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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