Rainbow Trout Stocked · 15 plants · last June 9, 2026 Best: dawn, dusk Hatfield Reservoir fishing
Hatfield Reservoir fishing has Rainbow Trout on the stocking report. Also recorded: Brook Stickleback. It is stocked about 0.9 times a year since 2011, most often in April and May. Species guides list dawn and dusk as the active times.
- Last stocked
- June 9, 2026
- · Rainbow Trout
- Plants on record
- 15
- Since 2011
- Species stocked
- 1 (+1 also recorded)
- Average size
- 3.2 in
- Elevation
- 2,527.6 ft
Fish at Hatfield Reservoir
Around the dates Hatfield Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 54.3°F in May, 39.3°F in April, 64.1°F in June. That is air temperature at these coordinates, not water temperature. Open-Meteo
Rainbow Trout Stocked · 15 plants · last June 9, 2026 Best: dawn, dusk Brook Stickleback Confirmed present
How Hatfield Reservoir is stocked
No plants recorded in 2021.
Fish stocked in 2011
3,000
Fish stocked in 2012
3,000
Fish stocked in 2013
2,994
Fish stocked in 2014
3,000
Fish stocked in 2015
3,000
Fish stocked in 2016
3,000
Fish stocked in 2017
3,000
Fish stocked in 2018
3,000
Fish stocked in 2019
3,000
Fish stocked in 2020
3,113
Fish stocked in 2022
3,000
Fish stocked in 2023
3,000
Fish stocked in 2024
3,000
Fish stocked in 2025
1,000
Fish stocked in 2026
1,000
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| June 9, 2026 | Rainbow Trout | 1,000 | 6.97 in | report |
| June 9, 2025 | Rainbow Trout | 1,000 | 7.03 in | report |
| May 15, 2024 | Rainbow Trout | 3,000 | 2.92 in | report |
| May 17, 2023 | Rainbow Trout | 3,000 | 2.63 in | report |
| May 11, 2022 | Rainbow Trout | 3,000 | 3.25 in | report |
| May 20, 2020 | Rainbow Trout | 3,113 | 3.23 in | report |
| May 14, 2019 | Rainbow Trout | 3,000 | 2.65 in | report |
| May 4, 2018 | Rainbow Trout | 3,000 | 2.38 in | report |
| April 14, 2017 | Rainbow Trout | 3,000 | 2.02 in | report |
| April 8, 2016 | Rainbow Trout | 3,000 | 2.09 in | report |
| April 17, 2015 | Rainbow Trout | 3,000 | 2.04 in | report |
| April 17, 2014 | Rainbow Trout | 3,000 | 2.1 in | report |
| June 13, 2013 | Rainbow Trout | 2,994 | 3.05 in | report |
| May 9, 2012 | Rainbow Trout | 3,000 | 2.71 in | report |
| June 2, 2011 | Rainbow Trout | 3,000 | 3.36 in | report |
Access and facts
- Nearest town
- Flaxville
Small (about 4.5-acre) reservoir near Flaxville: 3 miles east on Hwy 5, right on Gunderson Rd for 3 miles, right on Navajo Rd for 3/4 mile, then right.
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 Hatfield Reservoir?
Fishing Hatfield Reservoir usually means Rainbow Trout. All 15 plants on record are Rainbow Trout. Rainbow Trout was last stocked June 9, 2026, averaging 3.2 in. Brook Stickleback is recorded here outside the stocking reports.
When is Hatfield Reservoir stocked?
Last stocked June 9, 2026. It is stocked about 0.9 times a year since 2011, most often in April and May. No plants recorded in 2021.
How big are the fish stocked at Hatfield Reservoir?
Rainbow Trout stocked at Hatfield Reservoir average 3.2 in.
How do you get on Hatfield Reservoir?
The nearest town is Flaxville. Small (about 4.5-acre) reservoir near Flaxville: 3 miles east on Hwy 5, right on Gunderson Rd for 3 miles, right on Navajo Rd for 3/4 mile, then right.
Which lakes near Hatfield Reservoir were stocked more recently?
Holtan Reservoir (12.8 mi) and Boxelder Lake (24 mi) were stocked more recently. Holtan Reservoir is also stocked with Rainbow Trout and Boxelder Lake is also stocked with Rainbow Trout.