Ackley Lake Fish Stocking
Montana · 1932–2026 on record
According to Montana fish & wildlife agency, Ackley Lake was last stocked May 20, 2026 with Rainbow Trout. Ackley Lake has 255 stocking records on file, spanning 1932–2026, with about 4,400,100 fish stocked over that period.
When Ackley Lake is stocked
Ackley Lake is typically stocked in spring, most often in May — 103 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Ackley Lake, freshest activity first.
Barta Pond
16 mi1 species · 62 records
Last stocked July 2025
Dipping Vat Pond
17 mi1 species · 11 records
Last stocked June 2025
South Fork Judith River
17 mi2 species · 171 records
Last stocked September 2011
C-1 Reservoir
14 mi3 species · 30 records
Last stocked June 2004
Middle Fork Judith River
17 mi2 species · 98 records
Last stocked August 1994
Knutson Reservoir
10 mi2 species · 14 records
Last stocked May 1984
By species
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 20, 2026 | Rainbow Trout | 10,300 | 2.84" | Montana fish & wildlife agency |
| May 20, 2026 | Rainbow Trout | 14,670 | 4.18" | Montana fish & wildlife agency |
| May 13, 2025 | Rainbow Trout | 10,017 | 3.01" | Montana fish & wildlife agency |
| May 13, 2025 | Rainbow Trout | 15,346 | 4.33" | Montana fish & wildlife agency |
| November 19, 2024 | Rainbow Trout | 4,683 | 2.34" | Montana fish & wildlife agency |
| July 10, 2024 | Rainbow Trout | 1,317 | 8.09" | Montana fish & wildlife agency |
| May 14, 2024 | Rainbow Trout | 15,036 | 4.29" | Montana fish & wildlife agency |
| May 14, 2024 | Brown Trout | 2,518 | 3.47" | Montana fish & wildlife agency |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 14, 2024 | Rainbow Trout | 10,180 | 2.81" | Montana fish & wildlife agency |
| July 14, 2023 | Tiger Trout | 200 | 10.86" | Montana fish & wildlife agency |
| May 22, 2023 | Rainbow Trout | 14,839 | 4.38" | Montana fish & wildlife agency |
| May 22, 2023 | Rainbow Trout | 10,000 | 3.33" | Montana fish & wildlife agency |
| June 30, 2022 | Rainbow Trout | 298 | 6.31" | Montana fish & wildlife agency |
| May 23, 2022 | Rainbow Trout | 9,570 | 3.41" | Montana fish & wildlife agency |
| May 19, 2022 | Rainbow Trout | 34,744 | 3.77" | Montana fish & wildlife agency |
| June 21, 2021 | Rainbow Trout | 4,976 | 5.27" | Montana fish & wildlife agency |
| May 10, 2021 | Rainbow Trout | 35,038 | 4.28" | Montana fish & wildlife agency |
| May 10, 2021 | Rainbow Trout | 22,070 | 2.85" | Montana fish & wildlife agency |
| May 11, 2020 | Rainbow Trout | 36,810 | 3.86" | Montana fish & wildlife agency |
| May 11, 2020 | Rainbow Trout | 20,036 | 2.77" | Montana fish & wildlife agency |
| June 26, 2019 | Rainbow Trout | 1,455 | 9.51" | Montana fish & wildlife agency |
| May 21, 2019 | Rainbow Trout | 23,869 | 3.1" | Montana fish & wildlife agency |
| May 2, 2019 | Rainbow Trout | 35,021 | 3.8" | Montana fish & wildlife agency |
| September 20, 2018 | Rainbow Trout | 11,238 | 5.47" | Montana fish & wildlife agency |
| July 2, 2018 | Rainbow Trout | 3,700 | 4.88" | Montana fish & wildlife agency |
| May 24, 2018 | Rainbow Trout | 15,030 | 3" | Montana fish & wildlife agency |
| May 14, 2018 | Rainbow Trout | 20,004 | 4.06" | Montana fish & wildlife agency |
| September 20, 2017 | Rainbow Trout | 16,943 | 5.01" | Montana fish & wildlife agency |
| June 6, 2017 | Rainbow Trout | 15,307 | 4.44" | Montana fish & wildlife agency |
| May 16, 2017 | Rainbow Trout | 11,735 | 3.08" | Montana fish & wildlife agency |
| May 16, 2017 | Rainbow Trout | 3,296 | 3.12" | Montana fish & wildlife agency |
| April 27, 2017 | Rainbow Trout | 15,044 | 4.82" | Montana fish & wildlife agency |
| September 22, 2016 | Rainbow Trout | 15,359 | 4.73" | Montana fish & wildlife agency |
| May 16, 2016 | Rainbow Trout | 15,015 | 3.01" | Montana fish & wildlife agency |
| May 2, 2016 | Rainbow Trout | 15,014 | 3.8" | Montana fish & wildlife agency |
| September 22, 2015 | Rainbow Trout | 10,096 | 4.88" | Montana fish & wildlife agency |
| July 15, 2015 | Tiger Trout | 1,000 | 4" | Montana fish & wildlife agency |
| May 28, 2015 | Tiger Trout | 3,000 | 1.25" | Montana fish & wildlife agency |
| May 20, 2015 | Brown Trout | 2,503 | 3.85" | Montana fish & wildlife agency |
| May 20, 2015 | Rainbow Trout | 3,657 | 5.58" | Montana fish & wildlife agency |
| May 20, 2015 | Rainbow Trout | 11,366 | 4.11" | Montana fish & wildlife agency |
| May 20, 2015 | Rainbow Trout | 30,014 | 3.02" | Montana fish & wildlife agency |
| June 5, 2014 | Rainbow Trout | 7,113 | 4.25" | Montana fish & wildlife agency |
| June 5, 2014 | Rainbow Trout | 7,914 | 4.24" | Montana fish & wildlife agency |
| May 27, 2014 | Rainbow Trout | 30,163 | 3.06" | Montana fish & wildlife agency |
| May 22, 2013 | Rainbow Trout | 10,098 | 4.24" | Montana fish & wildlife agency |
| May 22, 2013 | Rainbow Trout | 30,064 | 2.88" | Montana fish & wildlife agency |
| May 23, 2012 | Rainbow Trout | 30,000 | 2.8" | Montana fish & wildlife agency |
| April 11, 2012 | Rainbow Trout | 10,018 | 3.22" | Montana fish & wildlife agency |
| June 3, 2011 | Rainbow Trout | 17,574 | 2.8" | Montana fish & wildlife agency |
Showing 50 of 255 stocking records.
Frequently asked
When was Ackley Lake last stocked?
According to Montana fish & wildlife agency, Ackley Lake was last stocked May 20, 2026 with Rainbow Trout.
What fish species are stocked in Ackley Lake?
Ackley Lake is stocked with Rainbow Trout, Brown Trout, Tiger Trout, Kokanee, Cutthroat Trout, Brook Trout, and Coho Salmon.
What time of year is Ackley Lake stocked?
Ackley Lake is typically stocked in spring, most often in May.
How often is Ackley Lake stocked?
Ackley Lake has been stocked about 3 times a year — 255 recorded stockings between 1932 and 2026.
How many fish have been stocked in Ackley Lake?
About 4,400,100 fish have been stocked in Ackley Lake across 255 recorded events since 1932, per Montana fish & wildlife agency.
What size are the fish stocked in Ackley Lake?
Fish stocked in Ackley Lake average about 4.5 inches, based on the sizes the agency reported.