Lower Hassler Reservoir Fish Stocking
Montana · 2007–2023 on record
According to Montana fish & wildlife agency, Lower Hassler Reservoir was last stocked July 27, 2023 with Largemouth Bass. Lower Hassler Reservoir has 13 stocking records on file, spanning 2007–2023, with about 3,000 fish stocked over that period.
When Lower Hassler Reservoir is stocked
Lower Hassler Reservoir is typically stocked in summer, most often in July — 6 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Lower Hassler Reservoir, freshest activity first.
Upper Carters Pond
7 mi6 species · 158 records
Last stocked June 2026
Carters Pond
8 mi3 species · 73 records
Last stocked May 2026
Upper Hasler Pond
0 mi1 species · 7 records
Last stocked May 2025
Boy Scout Pond
3 mi1 species · 28 records
Last stocked June 2019
Middle Hassler Reservoir
0 mi1 species · 2 records
Last stocked June 2007
Hassler Pond
4 mi2 species · 2 records
Last stocked June 2007
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| July 27, 2023 | Largemouth Bass | 250 | 1.8" | Montana fish & wildlife agency |
| July 27, 2020 | Largemouth Bass | 250 | 1.92" | Montana fish & wildlife agency |
| July 26, 2019 | Largemouth Bass | 250 | 1.54" | Montana fish & wildlife agency |
| August 2, 2017 | Largemouth Bass | 250 | 40.8" | Montana fish & wildlife agency |
| July 22, 2015 | Largemouth Bass | 250 | 3" | Montana fish & wildlife agency |
| May 17, 2013 | Rainbow Trout | 200 | 7.75" | Montana fish & wildlife agency |
| April 16, 2012 | Rainbow Trout | 203 | 7" | Montana fish & wildlife agency |
| May 17, 2011 | Rainbow Trout | 201 | 7.11" | Montana fish & wildlife agency |
Show 5 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 17, 2010 | Rainbow Trout | 201 | 7.61" | Montana fish & wildlife agency |
| May 19, 2009 | Rainbow Trout | 201 | 8" | Montana fish & wildlife agency |
| May 7, 2008 | Rainbow Trout | 196 | 7.74" | Montana fish & wildlife agency |
| July 13, 2007 | Rainbow Trout | 50 | 8.09" | Montana fish & wildlife agency |
| July 13, 2007 | Rainbow Trout | 498 | 5.72" | Montana fish & wildlife agency |
Frequently asked
When was Lower Hassler Reservoir last stocked?
According to Montana fish & wildlife agency, Lower Hassler Reservoir was last stocked July 27, 2023 with Largemouth Bass.
What fish species are stocked in Lower Hassler Reservoir?
Lower Hassler Reservoir is stocked with Largemouth Bass and Rainbow Trout.
What time of year is Lower Hassler Reservoir stocked?
Lower Hassler Reservoir is typically stocked in summer, most often in July.
How often is Lower Hassler Reservoir stocked?
Lower Hassler Reservoir is stocked intermittently — 13 recorded stockings between 2007 and 2023.
How many fish have been stocked in Lower Hassler Reservoir?
About 3,000 fish have been stocked in Lower Hassler Reservoir across 13 recorded events since 2007, per Montana fish & wildlife agency.
What size are the fish stocked in Lower Hassler Reservoir?
Fish stocked in Lower Hassler Reservoir average about 8.3 inches, based on the sizes the agency reported.