Cutthroat Trout Stocked · 10 plants · last August 17, 2024 Last stocked August 17, 2024 · avg 1.6 in · 10 plants
Cutthroat Trout species guideBig Therriault Lake fishing
Big Therriault Lake fishing has Cutthroat Trout on the stocking report. It is stocked about 0.7 times a year since 2011, most often in August and September.
- Last stocked
- August 17, 2024
- · Cutthroat Trout
- Plants on record
- 10
- Since 2011
- Species recorded
- 1
- Average size
- 1.6 in
- Elevation
- 5,549.7 ft
Fish at Big Therriault Lake
Around the dates Big Therriault Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 60°F in August, 50.8°F in September, 61°F in July, 35.3°F in October. That is air temperature at these coordinates, not water temperature. Open-Meteo
Cutthroat Trout Stocked · 10 plants · last August 17, 2024 How Big Therriault Lake is stocked
No plants recorded in 2013, 2016, 2018, and 2020.
Fish stocked in 2011
4,050
Fish stocked in 2012
3,604
Fish stocked in 2014
4,327
Fish stocked in 2015
3,599
Fish stocked in 2017
3,870
Fish stocked in 2019
4,000
Fish stocked in 2021
4,000
Fish stocked in 2022
4,000
Fish stocked in 2023
4,250
Fish stocked in 2024
4,000
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| August 17, 2024 | Cutthroat Trout | 4,000 | 2 in | report |
| July 14, 2023 | Cutthroat Trout | 4,250 | 1.14 in | report |
| October 11, 2022 | Cutthroat Trout | 4,000 | 1.75 in | report |
| August 19, 2021 | Cutthroat Trout | 4,000 | 1.99 in | report |
| August 5, 2019 | Cutthroat Trout | 4,000 | 1.21 in | report |
| September 7, 2017 | Cutthroat Trout | 3,870 | 2 in | report |
| September 9, 2015 | Cutthroat Trout | 3,599 | 1.83 in | report |
| August 18, 2014 | Cutthroat Trout | 4,327 | 1.26 in | report |
| August 22, 2012 | Cutthroat Trout | 3,604 | 1.52 in | report |
| August 31, 2011 | Cutthroat Trout | 4,050 | 1.47 in | report |
Access and facts
- Nearest town
- Fortine
- Boat ramp
- Yes
- Facilities
- restrooms, camping
Kootenai National Forest campground on the lake, 12.5 air miles from Fortine: 10 sites with tables and fire rings, room for RVs up to 32 feet, vault toilets, food storage boxes, and a boat ramp built for small boats. Managed as a campground in summer; road access depends on weather.
Drafted by AI from the cited sources and checked before publishing.
Advisories, closures, regulations and water conditions change. Check the Montana Fish, Wildlife & Parks before you go.
About Big Therriault Lake
Access is dependent upon weather conditions, which could impact visitor plans. (fs.usda.gov, accessed September 22, 2026)
Drafted by AI from the cited sources and checked before publishing.
Nearest lakes
Public land at Big Therriault Lake
Big Therriault Lake is 0.1 miles outside the edge of Kootenai National Forest.
Boundaries from Public Lands DB, part of the same network.
Common questions
What fish are at Big Therriault Lake?
Fishing Big Therriault Lake usually means Cutthroat Trout. All 10 plants on record are Cutthroat Trout. Cutthroat Trout was last stocked August 17, 2024, averaging 1.6 in.
When is Big Therriault Lake stocked?
Last stocked August 17, 2024. It is stocked about 0.7 times a year since 2011, most often in August and September. No plants recorded in 2013, 2016, 2018, and 2020.
How big are the fish stocked at Big Therriault Lake?
Cutthroat Trout stocked at Big Therriault Lake average 1.6 in.
How do you get on Big Therriault Lake?
There is a boat ramp. The nearest town is Fortine. Facilities include restrooms and camping. Kootenai National Forest campground on the lake, 12.5 air miles from Fortine: 10 sites with tables and fire rings, room for RVs up to 32 feet, vault toilets, food storage boxes, and a boat ramp built for small boats. Managed as a campground in summer; road access depends on weather.
Which lakes near Big Therriault Lake were stocked more recently?
Moran Lake (10.5 mi) and Tetrault Lake (10.8 mi) were stocked more recently. Tetrault Lake is also stocked with Cutthroat Trout.