Island Lake fishing

Fishing at Island Lake 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

Plants on record

Since 2011

Species recorded

Average size

1.9 in

Elevation

5,265.7 ft

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How Island Lake is stocked

The first plant of the year usually falls in the fourth week of July. In 2024 it was September 30, 2024, later than usual.

No plants recorded in 8 years between 2011 and 2024.

Glen Lake (2 mi), Spring Meadow Lake (9.9 mi), Helena Valley Regulating Reservoir (18.6 mi), and East Fork Reservoir (20.4 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.

Fish at Island Lake

Fishing Island Lake is most likely to be for Cutthroat Trout. Cutthroat Trout accounts for 4 of 9 plants on record, ahead of Golden Trout and one more.

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 4 plants

Plants: 4 of 9
Last stocked: August 1, 2023
Average length: 2.6 in

Seasons and rigs are on the Cutthroat Trout guide.

Golden Trout 3 plants

Plants: 3 of 9
Last stocked: September 30, 2024
Average length: 1.2 in

Seasons and rigs are on the Golden Trout guide.

Largemouth Bass 2 plants

Plants: 2 of 9
Last stocked: July 25, 2012
Average length: 1.4 in

Seasons and rigs are on the Largemouth Bass guide.

Fish stocked per year

24,0002011
22,5002012
1,5002017
5002020
5002023
5002024

Stocking history

All species Cutthroat Trout Largemouth Bass Golden Trout

Source: Montana Fish, Wildlife & Parks.
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

Species stocked here

Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.