Rainbow Trout Stocked · 17 plants · last May 6, 2026 Best: dawn, dusk Lost Lake fishing
Lost Lake fishing has Rainbow Trout, Arctic Grayling, and Cutthroat Trout on the stocking report. It is stocked about 1.3 times a year since 2011, most often in May and June. Species guides list dawn and dusk as the active times.
- Last stocked
- May 6, 2026
- · Rainbow Trout
- Plants on record
- 20
- Since 2011
- Species recorded
- 3
- Average size
- 5.7 in
- Elevation
- 2,947.9 ft
Fish at Lost Lake
Around the dates Lost Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 52.4°F in May, 60.1°F in June, 68.3°F in July, 57.9°F in September. That is air temperature at these coordinates, not water temperature. Open-Meteo
Rainbow Trout Stocked · 17 plants · last May 6, 2026 Best: dawn, dusk 
Arctic Grayling Stocked · 2 plants · last September 18, 2018 Last stocked September 18, 2018 · avg 2 in · 2 plants
Arctic Grayling species guide
Cutthroat Trout Stocked · 1 plant · last July 20, 2020 Last stocked July 20, 2020 · avg 2.8 in · 1 plant
Cutthroat Trout species guideHow Lost Lake is stocked
No plants recorded in 2014.
Fish stocked in 2011
948
Fish stocked in 2012
908
Fish stocked in 2013
959
Fish stocked in 2015
1,203
Fish stocked in 2016
1,002
Fish stocked in 2017
1,000
Fish stocked in 2018
1,800
Fish stocked in 2019
2,242
Fish stocked in 2020
1,451
Fish stocked in 2021
1,000
Fish stocked in 2022
1,000
Fish stocked in 2023
1,100
Fish stocked in 2024
1,100
Fish stocked in 2025
1,011
Fish stocked in 2026
1,007
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| May 6, 2026 | Rainbow Trout | 1,007 | 3.26 in | report |
| July 1, 2025 | Rainbow Trout | 1,011 | 3.76 in | report |
| May 13, 2024 | Rainbow Trout | 1,100 | 7.76 in | report |
| May 9, 2023 | Rainbow Trout | 1,100 | 7.74 in | report |
| May 18, 2022 | Rainbow Trout | 1,000 | 7.98 in | report |
| June 3, 2021 | Rainbow Trout | 1,000 | 7.4 in | report |
| July 20, 2020 | Cutthroat Trout | 350 | 2.83 in | report |
| May 21, 2020 | Rainbow Trout | 1,101 | 7.15 in | report |
| October 8, 2019 | Rainbow Trout | 1,241 | 2.15 in | report |
| June 3, 2019 | Rainbow Trout | 1,001 | 7.21 in | report |
| September 18, 2018 | Arctic Grayling | 800 | 1.8 in | report |
| June 6, 2018 | Rainbow Trout | 1,000 | 7.46 in | report |
| May 24, 2017 | Rainbow Trout | 1,000 | 7.69 in | report |
| June 2, 2016 | Rainbow Trout | 1,002 | 7.28 in | report |
| September 14, 2015 | Arctic Grayling | 200 | 2.26 in | report |
| June 9, 2015 | Rainbow Trout | 1,003 | 6.01 in | report |
| September 12, 2013 | Rainbow Trout | 959 | 3.6 in | report |
| May 23, 2012 | Rainbow Trout | 908 | 8.83 in | report |
| July 1, 2011 | Rainbow Trout | 445 | 3.43 in | report |
| April 26, 2011 | Rainbow Trout | 503 | 7.92 in | report |
Access and facts
Advisories, closures, regulations and water conditions change. Check the Montana Fish, Wildlife & Parks before you go.
Nearest lakes
Public land at Lost Lake
Lost Lake is 0.3 miles outside the edge of Flathead National Forest.
Boundaries from Public Lands DB, part of the same network.
Common questions
What fish are at Lost Lake?
Fishing Lost Lake usually means Rainbow Trout: Rainbow Trout accounts for 17 of 20 plants on record, ahead of Arctic Grayling and one more. Rainbow Trout was last stocked May 6, 2026, averaging 6.3 in. Arctic Grayling was last stocked September 18, 2018, averaging 2 in. Cutthroat Trout was last stocked July 20, 2020, averaging 2.8 in.
When is Lost Lake stocked?
Last stocked May 6, 2026. It is stocked about 1.3 times a year since 2011, most often in May and June. No plants recorded in 2014.
How big are the fish stocked at Lost Lake?
Stocked fish average 5.7 in. Rainbow Trout average 6.3 in. Arctic Grayling average 2 in. Cutthroat Trout average 2.8 in.
Which lakes near Lost Lake were stocked more recently?
Pine Grove Pond (4.1 mi), Shady Lane Pond (4.7 mi), Snappys Pond (5.1 mi), and Beaver Lake (6.9 mi) were stocked more recently. Pine Grove Pond is also stocked with Rainbow Trout and Cutthroat Trout, Shady Lane Pond is also stocked with Cutthroat Trout and Rainbow Trout, Snappys Pond is also stocked with Rainbow Trout, Cutthroat Trout, and Arctic Grayling, and Beaver Lake is also stocked with Rainbow Trout and Cutthroat Trout.