Cutthroat Trout Stocked · 4 plants · last August 1, 2023 Last stocked August 1, 2023 · avg 2.6 in · 4 plants
Cutthroat Trout species guideIsland Lake fishing
Island Lake fishing has Cutthroat Trout, Largemouth Bass, and Golden Trout on the stocking report. It is stocked about 0.6 times a year since 2011, most often in July and September. Species guides list dawn and dusk as the active times.
- Last stocked
- September 30, 2024
- · Golden Trout
- Plants on record
- 9
- Since 2011
- Species recorded
- 3
- Average size
- 1.9 in
- Elevation
- 5,265.7 ft
Fish at Island Lake
Around the dates Island Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 66.4°F in July, 54.7°F in September, 64.1°F in August. That is air temperature at these coordinates, not water temperature. Open-Meteo
Cutthroat Trout Stocked · 4 plants · last August 1, 2023 
Golden Trout Stocked · 3 plants · last September 30, 2024 Best: dawn, dusk 
Largemouth Bass Stocked · 2 plants · last July 25, 2012 Best: dawn, dusk How Island Lake is stocked
No plants recorded in 8 years between 2011 and 2024.
Fish stocked in 2011
24,000
Fish stocked in 2012
22,500
Fish stocked in 2017
1,500
Fish stocked in 2020
500
Fish stocked in 2023
500
Fish stocked in 2024
500
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| September 30, 2024 | Golden Trout | 500 | 1.53 in | report |
| August 1, 2023 | Cutthroat Trout | 500 | 2.54 in | report |
| July 21, 2020 | Cutthroat Trout | 500 | 2.83 in | report |
| September 12, 2017 | Golden Trout | 1,000 | 1.09 in | report |
| July 24, 2017 | Cutthroat Trout | 500 | 2.3 in | report |
| July 25, 2012 | Largemouth Bass | 22,500 | 1.2 in | report |
| September 12, 2011 | Golden Trout | 500 | 0.93 in | report |
| July 27, 2011 | Largemouth Bass | 22,500 | 1.6 in | report |
| July 20, 2011 | Cutthroat Trout | 1,000 | 2.9 in | report |
Access and facts
Advisories, closures, regulations and water conditions change. Check the Montana Fish, Wildlife & Parks before you go.
Nearest lakes
Common questions
What fish are at Island Lake?
Fishing Island Lake usually means Cutthroat Trout: Cutthroat Trout accounts for 4 of 9 plants on record, ahead of Golden Trout and one more. Cutthroat Trout was last stocked August 1, 2023, averaging 2.6 in. Golden Trout was last stocked September 30, 2024, averaging 1.2 in. Largemouth Bass was last stocked July 25, 2012, averaging 1.4 in.
When is Island Lake stocked?
Last stocked September 30, 2024. It is stocked about 0.6 times a year since 2011, most often in July and September. No plants recorded in 8 years between 2011 and 2024.
How big are the fish stocked at Island Lake?
Stocked fish average 1.9 in. Cutthroat Trout average 2.6 in. Golden Trout average 1.2 in. Largemouth Bass average 1.4 in.
Which lakes near Island Lake were stocked more recently?
Glen Lake (1.7 mi), Spring Meadow Lake (9.9 mi), Helena Valley Regulating Reservoir (18.6 mi), and East Fork Reservoir (20.2 mi) were stocked more recently. Spring Meadow Lake is also stocked with Cutthroat Trout and East Fork Reservoir is also stocked with Cutthroat Trout and Largemouth Bass.