Holter Reservoir Fish Stocking
Montana · 1931–2025 on record
According to Montana fish & wildlife agency, Holter Reservoir was last stocked September 17, 2025 with Rainbow Trout. Holter Reservoir has 1,185 stocking records on file, spanning 1931–2025, with about 21,394,165 fish stocked over that period.
When Holter Reservoir is stocked
Holter Reservoir is typically stocked in fall, most often in September — 168 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Holter Reservoir, freshest activity first.
Unnamed
8 mi3 species · 26 records
Last stocked June 2026
Margaret Lake
13 mi1 species · 26 records
Last stocked August 2024
Hound Creek Reservoir
13 mi3 species · 22 records
Last stocked June 2015
Wildcat Creek
11 mi2 species · 4 records
Last stocked August 2011
Lake Helena
17 mi8 species · 28 records
Last stocked April 1999
Pollack Pond
11 mi1 species · 21 records
Last stocked July 1981
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| September 17, 2025 | Rainbow Trout | 12,929 | 7.65" | Montana fish & wildlife agency |
| September 17, 2025 | Rainbow Trout | 12,950 | 7.6" | Montana fish & wildlife agency |
| September 17, 2025 | Rainbow Trout | 12,929 | 7.65" | Montana fish & wildlife agency |
| September 16, 2025 | Rainbow Trout | 12,546 | 7.73" | Montana fish & wildlife agency |
| September 16, 2025 | Rainbow Trout | 11,640 | 7.77" | Montana fish & wildlife agency |
| September 16, 2025 | Rainbow Trout | 12,192 | 7.65" | Montana fish & wildlife agency |
| September 15, 2025 | Rainbow Trout | 12,312 | 7.62" | Montana fish & wildlife agency |
| September 15, 2025 | Rainbow Trout | 12,275 | 7.68" | Montana fish & wildlife agency |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| September 15, 2025 | Rainbow Trout | 12,264 | 7.63" | Montana fish & wildlife agency |
| June 30, 2025 | Rainbow Trout | 9,971 | 8.35" | Montana fish & wildlife agency |
| June 30, 2025 | Rainbow Trout | 8,688 | 8.56" | Montana fish & wildlife agency |
| June 30, 2025 | Rainbow Trout | 5,661 | 8.8" | Montana fish & wildlife agency |
| June 27, 2025 | Rainbow Trout | 9,949 | 8.27" | Montana fish & wildlife agency |
| June 27, 2025 | Rainbow Trout | 9,239 | 8.36" | Montana fish & wildlife agency |
| June 27, 2025 | Rainbow Trout | 9,600 | 8.28" | Montana fish & wildlife agency |
| June 26, 2025 | Rainbow Trout | 9,025 | 8.57" | Montana fish & wildlife agency |
| June 26, 2025 | Rainbow Trout | 9,792 | 8.23" | Montana fish & wildlife agency |
| June 26, 2025 | Rainbow Trout | 1,083 | 8.57" | Montana fish & wildlife agency |
| June 26, 2025 | Rainbow Trout | 8,568 | 8.23" | Montana fish & wildlife agency |
| June 25, 2025 | Rainbow Trout | 9,971 | 8.35" | Montana fish & wildlife agency |
| June 25, 2025 | Rainbow Trout | 11,256 | 7.85" | Montana fish & wildlife agency |
| October 15, 2024 | Rainbow Trout | 8,688 | 8.84" | Montana fish & wildlife agency |
| October 15, 2024 | Rainbow Trout | 5,340 | 8.84" | Montana fish & wildlife agency |
| October 15, 2024 | Rainbow Trout | 3,258 | 8.84" | Montana fish & wildlife agency |
| October 11, 2024 | Rainbow Trout | 9,115 | 8.85" | Montana fish & wildlife agency |
| October 11, 2024 | Rainbow Trout | 8,925 | 8.88" | Montana fish & wildlife agency |
| October 11, 2024 | Rainbow Trout | 8,884 | 8.9" | Montana fish & wildlife agency |
| October 10, 2024 | Rainbow Trout | 9,125 | 8.81" | Montana fish & wildlife agency |
| October 10, 2024 | Rainbow Trout | 8,928 | 8.76" | Montana fish & wildlife agency |
| October 10, 2024 | Rainbow Trout | 8,496 | 8.91" | Montana fish & wildlife agency |
| October 9, 2024 | Rainbow Trout | 8,736 | 8.82" | Montana fish & wildlife agency |
| October 9, 2024 | Rainbow Trout | 9,286 | 8.7" | Montana fish & wildlife agency |
| October 9, 2024 | Rainbow Trout | 9,009 | 8.79" | Montana fish & wildlife agency |
| July 5, 2024 | Rainbow Trout | 13,916 | 7.68" | Montana fish & wildlife agency |
| July 3, 2024 | Rainbow Trout | 12,866 | 7.86" | Montana fish & wildlife agency |
| July 3, 2024 | Rainbow Trout | 13,695 | 7.65" | Montana fish & wildlife agency |
| July 2, 2024 | Rainbow Trout | 12,300 | 7.98" | Montana fish & wildlife agency |
| July 2, 2024 | Rainbow Trout | 12,213 | 8.02" | Montana fish & wildlife agency |
| July 1, 2024 | Rainbow Trout | 11,956 | 8" | Montana fish & wildlife agency |
| July 1, 2024 | Rainbow Trout | 13,208 | 7.89" | Montana fish & wildlife agency |
| June 28, 2024 | Rainbow Trout | 13,230 | 7.74" | Montana fish & wildlife agency |
| June 28, 2024 | Rainbow Trout | 13,653 | 7.66" | Montana fish & wildlife agency |
| June 26, 2024 | Rainbow Trout | 14,688 | 7.57" | Montana fish & wildlife agency |
| September 21, 2023 | Rainbow Trout | 10,688 | 7.82" | Montana fish & wildlife agency |
| September 21, 2023 | Rainbow Trout | 9,878 | 7.97" | Montana fish & wildlife agency |
| September 20, 2023 | Rainbow Trout | 10,536 | 8.03" | Montana fish & wildlife agency |
| September 20, 2023 | Rainbow Trout | 9,982 | 8.06" | Montana fish & wildlife agency |
| September 20, 2023 | Rainbow Trout | 10,488 | 8.04" | Montana fish & wildlife agency |
| September 19, 2023 | Rainbow Trout | 11,325 | 7.95" | Montana fish & wildlife agency |
| September 19, 2023 | Rainbow Trout | 11,568 | 7.78" | Montana fish & wildlife agency |
Showing 50 of 500 stocking records.
Frequently asked
When was Holter Reservoir last stocked?
According to Montana fish & wildlife agency, Holter Reservoir was last stocked September 17, 2025 with Rainbow Trout.
What fish species are stocked in Holter Reservoir?
Holter Reservoir is stocked with Rainbow Trout and Kokanee.
What time of year is Holter Reservoir stocked?
Holter Reservoir is typically stocked in fall, most often in September.
How often is Holter Reservoir stocked?
Holter Reservoir has been stocked about 12 times a year — 1,185 recorded stockings between 1931 and 2025.
How many fish have been stocked in Holter Reservoir?
About 21,394,165 fish have been stocked in Holter Reservoir across 1,185 recorded events since 1931, per Montana fish & wildlife agency.
What size are the fish stocked in Holter Reservoir?
Fish stocked in Holter Reservoir average about 6.6 inches, based on the sizes the agency reported.