Rainbow Trout Stocked · 18 plants · last July 8, 2025 Best: dawn, dusk Big Casino Creek Reservoir fishing
Big Casino Creek Reservoir fishing is stocked with Rainbow Trout, Largemouth Bass, and Tiger Muskie on a reservoir. Also recorded: Black Crappie and Yellow Perch. It is stocked about 2 times a year since 2011, most often in June and July. Species guides list dawn and dusk for Rainbow Trout and Largemouth Bass, dawn, dusk, and night for Black Crappie, and dawn, day, and dusk for Yellow Perch.
- Last stocked
- August 7, 2025
- · Largemouth Bass
- Plants on record
- 30
- Since 2011
- Species stocked
- 3 (+2 also recorded)
- Average size
- 7.1 in
- Elevation
- 4,039.6 ft
Fish at Big Casino Creek Reservoir
Around the dates Big Casino Creek Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 61°F in June, 69.9°F in July, 51.5°F in May, 68.3°F in August. That is air temperature at these coordinates, not water temperature. Open-Meteo
Rainbow Trout Stocked · 18 plants · last July 8, 2025 Best: dawn, dusk 
Largemouth Bass Stocked · 10 plants · last August 7, 2025 Best: dawn, dusk 
Tiger Muskie Stocked · 2 plants · last June 29, 2020 Last stocked June 29, 2020 · avg 7.1 in · 2 plants
Tiger Muskie species guide
Black Crappie Confirmed present Best: dawn, dusk, night Best: dawn, dusk, night
Black Crappie species guide
Yellow Perch Confirmed present Best: dawn, day, dusk Best: dawn, day, dusk
Yellow Perch species guideHow Big Casino Creek Reservoir is stocked
Upper Frog Pond (1.6 mi), Hansen Reservoir (5.2 mi), Carters Pond (7.5 mi), and Upper Carters Pond (8.2 mi) were stocked more recently. Upper Frog Pond is also stocked with Rainbow Trout, Hansen Reservoir is also stocked with Rainbow Trout, Carters Pond is also stocked with Rainbow Trout, and Upper Carters Pond is also stocked with Rainbow Trout.
Fish stocked in 2011
1,751
Fish stocked in 2012
1,620
Fish stocked in 2013
1,500
Fish stocked in 2014
1,000
Fish stocked in 2015
5,000
Fish stocked in 2016
5,000
Fish stocked in 2017
5,000
Fish stocked in 2018
3,000
Fish stocked in 2019
5,075
Fish stocked in 2020
7,050
Fish stocked in 2021
6,043
Fish stocked in 2022
600
Fish stocked in 2023
6,000
Fish stocked in 2024
5,000
Fish stocked in 2025
5,534
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| August 7, 2025 | Largemouth Bass | 5,000 | 1.56 in | report |
| July 8, 2025 | Rainbow Trout | 534 | 9.48 in | report |
| August 9, 2024 | Largemouth Bass | 5,000 | 1.35 in | report |
| July 22, 2023 | Largemouth Bass | 5,000 | 1.58 in | report |
| June 16, 2023 | Rainbow Trout | 1,000 | 10 in | report |
| June 9, 2022 | Rainbow Trout | 600 | 5.84 in | report |
| July 21, 2021 | Largemouth Bass | 5,000 | 1.89 in | report |
| June 17, 2021 | Rainbow Trout | 893 | 8.6 in | report |
| June 17, 2021 | Rainbow Trout | 150 | 12.85 in | report |
| July 13, 2020 | Largemouth Bass | 7,000 | 0.8 in | report |
| June 29, 2020 | Tiger Muskie | 50 | 10.49 in | report |
| July 26, 2019 | Largemouth Bass | 5,000 | 1.55 in | report |
| June 13, 2019 | Tiger Muskie | 75 | 3.7 in | report |
| July 19, 2018 | Largemouth Bass | 3,000 | 2.02 in | report |
| August 8, 2017 | Largemouth Bass | 5,000 | 1.62 in | report |
| July 28, 2016 | Largemouth Bass | 5,000 | 1.89 in | report |
| August 3, 2015 | Largemouth Bass | 5,000 | 2 in | report |
| June 16, 2014 | Rainbow Trout | 500 | 8.74 in | report |
| May 2, 2014 | Rainbow Trout | 500 | 12.3 in | report |
| September 18, 2013 | Rainbow Trout | 500 | 12.13 in | report |
| May 30, 2013 | Rainbow Trout | 250 | 9.47 in | report |
| May 30, 2013 | Rainbow Trout | 250 | 12.3 in | report |
| May 9, 2013 | Rainbow Trout | 500 | 12.64 in | report |
| October 10, 2012 | Rainbow Trout | 111 | 11.35 in | report |
| September 17, 2012 | Rainbow Trout | 501 | 11.1 in | report |
| June 4, 2012 | Rainbow Trout | 500 | 7.87 in | report |
| April 16, 2012 | Rainbow Trout | 508 | 7 in | report |
| September 21, 2011 | Rainbow Trout | 253 | 12.46 in | report |
| September 6, 2011 | Rainbow Trout | 500 | 8.7 in | report |
| June 23, 2011 | Rainbow Trout | 998 | 8.37 in | report |
Access and facts
- Water type
- reservoir
- Nearest town
- Lewistown
- Facilities
- restrooms, dock
Day-use FWP fishing access site. From Lewistown take Castle Butte Road 1.4 miles, turn right on Reservoir Drive, and go 0.5 miles. Hand launch, vault toilet, an ADA-accessible fishing pier, and a floating dock off the rebuilt shoreline.
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 Big Casino Creek Reservoir?
Fishing Big Casino Creek Reservoir usually means Rainbow Trout: Rainbow Trout accounts for 18 of 30 plants on record, ahead of Largemouth Bass and one more. Rainbow Trout was last stocked July 8, 2025, averaging 10.1 in. Largemouth Bass was last stocked August 7, 2025, averaging 1.6 in. Tiger Muskie was last stocked June 29, 2020, averaging 7.1 in. Black Crappie and Yellow Perch are recorded here outside the stocking reports.
When is Big Casino Creek Reservoir stocked?
Last stocked August 7, 2025. It is stocked about 2 times a year since 2011, most often in June and July.
How big are the fish stocked at Big Casino Creek Reservoir?
Stocked fish average 7.1 in. Rainbow Trout average 10.1 in. Largemouth Bass average 1.6 in. Tiger Muskie average 7.1 in.
How do you get on Big Casino Creek Reservoir?
The nearest town is Lewistown. Facilities include restrooms and dock. Day-use FWP fishing access site. From Lewistown take Castle Butte Road 1.4 miles, turn right on Reservoir Drive, and go 0.5 miles. Hand launch, vault toilet, an ADA-accessible fishing pier, and a floating dock off the rebuilt shoreline.
Which lakes near Big Casino Creek Reservoir were stocked more recently?
Upper Frog Pond (1.6 mi), Hansen Reservoir (5.2 mi), Carters Pond (7.5 mi), and Upper Carters Pond (8.2 mi) were stocked more recently. Upper Frog Pond is also stocked with Rainbow Trout, Hansen Reservoir is also stocked with Rainbow Trout, Carters Pond is also stocked with Rainbow Trout, and Upper Carters Pond is also stocked with Rainbow Trout.