Upper Mason Lake Fish Stocking
Montana · 1984–2024 on record
According to Montana fish & wildlife agency, Upper Mason Lake was last stocked September 19, 2024 with Cutthroat Trout. Upper Mason Lake has 11 stocking records on file, spanning 1984–2024, with about 6,005 fish stocked over that period.
When Upper Mason Lake is stocked
Nearby stocked waters
Other stocked waters near Upper Mason Lake, freshest activity first.
Upper Sureshot Lake
6 mi1 species · 1 records
Last stocked July 2025
Louise Lake
3 mi2 species · 17 records
Last stocked September 2024
Brannan Lakes
5 mi2 species · 7 records
Last stocked September 2024
Upper Boulder Lake
6 mi1 species · 10 records
Last stocked September 2024
Sureshot Lake
7 mi2 species · 22 records
Last stocked September 2024
Lost Cabin Lake
5 mi1 species · 11 records
Last stocked July 2022
By species
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| September 19, 2024 | Cutthroat Trout | 500 | 2.09" | Montana fish & wildlife agency |
| July 21, 2020 | Cutthroat Trout | 500 | 1.96" | Montana fish & wildlife agency |
| July 26, 2016 | Cutthroat Trout | 500 | 1.68" | Montana fish & wildlife agency |
| August 5, 2012 | Cutthroat Trout | 500 | 1.81" | Montana fish & wildlife agency |
| July 28, 2008 | Cutthroat Trout | 500 | 1.28" | Montana fish & wildlife agency |
| August 6, 2004 | Cutthroat Trout | 500 | 2.33" | Montana fish & wildlife agency |
| September 14, 2000 | Cutthroat Trout | 500 | 2.5" | Montana fish & wildlife agency |
| August 13, 1996 | Cutthroat Trout | 500 | 2.3" | Montana fish & wildlife agency |
Show 3 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| July 30, 1992 | Cutthroat Trout | 500 | 1.9" | Montana fish & wildlife agency |
| August 4, 1988 | Cutthroat Trout | 505 | 2.1" | Montana fish & wildlife agency |
| August 6, 1984 | Cutthroat Trout | 1,000 | 1" | Montana fish & wildlife agency |
Frequently asked
When was Upper Mason Lake last stocked?
According to Montana fish & wildlife agency, Upper Mason Lake was last stocked September 19, 2024 with Cutthroat Trout.
What fish species are stocked in Upper Mason Lake?
Upper Mason Lake is stocked with Cutthroat Trout.
How often is Upper Mason Lake stocked?
Upper Mason Lake is stocked intermittently — 11 recorded stockings between 1984 and 2024.
How many fish have been stocked in Upper Mason Lake?
About 6,005 fish have been stocked in Upper Mason Lake across 11 recorded events since 1984, per Montana fish & wildlife agency.
What size are the fish stocked in Upper Mason Lake?
Fish stocked in Upper Mason Lake average about 1.9 inches, based on the sizes the agency reported.