Largemouth Bass Stocked · 4 plants · last August 19, 2025 Best: dawn, dusk Lark Reservoir fishing
Lark Reservoir fishing has Largemouth Bass and Bluegill on the stocking report. It is stocked about 0.8 times a year since 2020, most often in July and August. Species guides list dawn and dusk for Largemouth Bass and dawn, day, and dusk for Bluegill.
- Last stocked
- August 19, 2025
- · Largemouth Bass
- Plants on record
- 5
- Since 2020
- Species recorded
- 2
- Average size
- 1.5 in
- Elevation
- 2,900.7 ft
Fish at Lark Reservoir
Around the dates Lark Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 74.6°F in July, 72.3°F in August, 34.4°F in November. That is air temperature at these coordinates, not water temperature. Open-Meteo
Largemouth Bass Stocked · 4 plants · last August 19, 2025 Best: dawn, dusk 
Bluegill Stocked · 1 plant · last November 2, 2020 Best: dawn, day, dusk How Lark Reservoir is stocked
No plants recorded in 2022 and 2023.
Fish stocked in 2020
9,500
Fish stocked in 2021
2,000
Fish stocked in 2024
3,000
Fish stocked in 2025
3,000
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| August 19, 2025 | Largemouth Bass | 3,000 | 2.91 in | report |
| August 19, 2024 | Largemouth Bass | 3,000 | 1.41 in | report |
| July 26, 2021 | Largemouth Bass | 2,000 | 1.88 in | report |
| November 2, 2020 | Bluegill | 7,500 | 0.66 in | report |
| July 15, 2020 | Largemouth Bass | 2,000 | 0.78 in | report |
Access and facts
Small (about 5-acre) reservoir on federal BLM land, approximately 10 miles south of Dry Fork Rd off Hwy 191, on an unmarked road.
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.
Nearest lakes
Common questions
What fish are at Lark Reservoir?
Fishing Lark Reservoir usually means Largemouth Bass: Largemouth Bass accounts for 4 of 5 plants on record, ahead of Bluegill. Largemouth Bass was last stocked August 19, 2025, averaging 1.7 in. Bluegill was last stocked November 2, 2020, averaging 0.7 in.
When is Lark Reservoir stocked?
Last stocked August 19, 2025. It is stocked about 0.8 times a year since 2020, most often in July and August. No plants recorded in 2022 and 2023.
How big are the fish stocked at Lark Reservoir?
Stocked fish average 1.5 in. Largemouth Bass average 1.7 in. Bluegill average 0.7 in.
How do you get on Lark Reservoir?
Small (about 5-acre) reservoir on federal BLM land, approximately 10 miles south of Dry Fork Rd off Hwy 191, on an unmarked road.
Which lakes near Lark Reservoir were stocked more recently?
Sentinel Reservoir (4.7 mi), Sagebrush Reservoir (5.6 mi), Taint Reservoir (6.7 mi), Plutz Reservoir (6.7 mi), and Anita Reservoir (11.9 mi) were stocked more recently. Sagebrush Reservoir is also stocked with Largemouth Bass and Bluegill, Taint Reservoir is also stocked with Largemouth Bass and Bluegill, and Anita Reservoir is also stocked with Largemouth Bass and Bluegill.