Last stocked
October 20, 2025
Plants on record
47
Since 2011
Species recorded
2
Average size
1.4 in
Elevation
3,414.2 ft
Access and facts
- Water type
- reservoir
- Nearest town
- Decker
- Boat ramp
- Yes
- ADA accessible
- Yes
- Fee required
- Yes
- Facilities
- restrooms, camping, dock, cleaning station
Tongue River Reservoir State Park has two boat ramps with docks (Campers Point and Pee Wee North), 164 campsites, 23 vault toilets, a fish cleaning station, and ADA-accessible facilities near Decker.
Sources: water_type , access , shore_notes , nearest_town , facilities , fishing_notes , watch_outs
How Tongue River Reservoir is stocked
The first plant of the year usually falls in the second week of May. In 2025 it was May 5, 2025, about when it usually is.
Yellowtail Afterbay Reservoir (58.5 mi) was stocked more recently. Yellowtail Afterbay Reservoir is also stocked with Walleye.
Fish at Tongue River Reservoir
Fishing Tongue River Reservoir is most likely to be for Walleye. Walleye accounts for 34 of 47 plants on record, ahead of Crappie.
Around the dates Tongue River Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 67.2°F in June, 47.3°F in October, 55.5°F in May, 44°F in April. That is air temperature at these coordinates, not water temperature. Open-Meteo
Walleye 34 plants
- Plants
- 34 of 47
- Last stocked
- June 19, 2025
- Average length
- 1.2 in
Crappie 13 plants
- Plants
- 13 of 47
- Last stocked
- October 20, 2025
- Average length
- 2 in
Fishing Tongue River Reservoir
Tongue River Reservoir is a 12-mile long body of water located in southeastern Montana, offering excellent fishing opportunities. Many "state record" fish have been caught in its waters. The reservoir is known for excellent crappie, walleye, bass, and northern pike fishing. During winter, it serves as a popular ice fishing location.
Sources: fwp.mt.gov
What to watch for
Anglers should be aware that restrictions and closures may be in effect at Tongue River Reservoir State Park, potentially caused by floods, fire, drought, or major maintenance activities. It is advisable to check for current alerts before visiting.
Fish stocked per year
- 1,050,0002011
- 1,050,0002012
- 1,050,0002013
- 1,050,0002014
- 1,050,2202015
- 1,050,0002016
- 1,050,0002017
- 1,054,5782018
- 50,0002019
- 1,050,0002020
- 1,048,6302021
- 1,052,4952022
- 559,8962023
- 522,5162024
- 292,7092025
Stocking history
Showing 15 of 47 plants Showing 47 plants
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| October 20, 2025 | Crappie | 9,929 | 1.14 in | report |
| October 17, 2025 | Crappie | 7,042 | 1.62 in | report |
| October 16, 2025 | Crappie | 8,340 | 1.76 in | report |
| October 15, 2025 | Crappie | 4,898 | 1.72 in | report |
| June 19, 2025 | Walleye | 12,500 | 1.29 in | report |
| May 5, 2025 | Walleye | 250,000 | 0.25 in | report |
| October 17, 2024 | Crappie | 33,722 | 2.19 in | report |
| October 11, 2024 | Crappie | 2,412 | 2.97 in | report |
| October 10, 2024 | Crappie | 50,000 | 1.7 in | report |
| October 9, 2024 | Crappie | 12,807 | 1.8 in | report |
| October 8, 2024 | Crappie | 64,635 | 1.76 in | report |
| October 8, 2024 | Crappie | 65,552 | 1.79 in | report |
| October 7, 2024 | Crappie | 14,616 | 2.26 in | report |
| October 7, 2024 | Crappie | 16,272 | 1.48 in | report |
| June 11, 2024 | Walleye | 12,500 | 1.39 in | report |
| May 3, 2024 | Walleye | 250,000 | 0.25 in | report |
| October 10, 2023 | Crappie | 9,896 | 3.26 in | report |
| July 12, 2023 | Walleye | 50,000 | 2.01 in | report |
| May 13, 2023 | Walleye | 500,000 | 0.53 in | report |
| June 15, 2022 | Walleye | 52,495 | 1.19 in | report |
| May 13, 2022 | Walleye | 1,000,000 | 0.25 in | report |
| August 4, 2021 | Walleye | 4,497 | 6.42 in | report |
| July 6, 2021 | Walleye | 907 | 3.21 in | report |
| June 30, 2021 | Walleye | 26,836 | 1.62 in | report |
| June 28, 2021 | Walleye | 16,390 | 1.81 in | report |
| May 1, 2021 | Walleye | 1,000,000 | 0.25 in | report |
| June 10, 2020 | Walleye | 50,000 | 2.8 in | report |
| May 19, 2020 | Walleye | 1,000,000 | 0.47 in | report |
| June 19, 2019 | Walleye | 50,000 | 1.6 in | report |
| June 25, 2018 | Walleye | 14,775 | 1.85 in | report |
| June 24, 2018 | Walleye | 39,803 | 1.64 in | report |
| May 9, 2018 | Walleye | 1,000,000 | 0.2 in | report |
| June 14, 2017 | Walleye | 50,000 | 1.51 in | report |
| May 11, 2017 | Walleye | 1,000,000 | 0.25 in | report |
| June 14, 2016 | Walleye | 50,000 | 1.34 in | report |
| April 28, 2016 | Walleye | 1,000,000 | 0.25 in | report |
| June 18, 2015 | Walleye | 43,794 | 1.27 in | report |
| June 18, 2015 | Walleye | 6,426 | 1.69 in | report |
| May 7, 2015 | Walleye | 1,000,000 | 0.25 in | report |
| June 24, 2014 | Walleye | 50,000 | 1.25 in | report |
| May 9, 2014 | Walleye | 1,000,000 | 0.25 in | report |
| June 11, 2013 | Walleye | 50,000 | 1.5 in | report |
| May 14, 2013 | Walleye | 1,000,000 | 0.25 in | report |
| June 11, 2012 | Walleye | 50,000 | 1.49 in | report |
| April 28, 2012 | Walleye | 1,000,000 | 0.25 in | report |
| June 21, 2011 | Walleye | 50,000 | 1.12 in | report |
| May 17, 2011 | Walleye | 1,000,000 | 0.25 in | report |
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Species stocked here
Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.