Hatfield Reservoir fishing

Fishing at Hatfield Reservoir has Rainbow Trout on the stocking report. 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, 2025

Plants on record

14

Since 2011

Species recorded

1

Average size

3 in

Elevation

2,527.6 ft

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.

Sources: shore_notes , nearest_town , fishing_notes

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How Hatfield Reservoir is stocked

The first plant of the year usually falls in the second week of May. In 2025 it was June 9, 2025, later than usual.

No plants recorded in 2021.

Raymond Dam (23.9 mi) and Boxelder Lake (24 mi) were stocked more recently. Raymond Dam is also stocked with Rainbow Trout and Boxelder Lake is also stocked with Rainbow Trout.

Fish at Hatfield Reservoir

Fishing Hatfield Reservoir is most likely to be for Rainbow Trout. All 14 plants on record are Rainbow Trout.

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 14 plants
Plants
14 of 14
Last stocked
June 9, 2025
Average length
3 in

Seasons and rigs are on the Rainbow Trout guide.

Fishing Hatfield Reservoir

Hatfield Reservoir is categorized as a pond. Its waterbody information states a size of 4.5 acres, and 3,000 Rainbow Trout are stocked annually here. Anglers are not required to have landowner permission for access.

Sources: myfwp.mt.gov

Fish stocked per year

  • 3,0002011
  • 3,0002012
  • 2,9942013
  • 3,0002014
  • 3,0002015
  • 3,0002016
  • 3,0002017
  • 3,0002018
  • 3,0002019
  • 3,1132020
  • 3,0002022
  • 3,0002023
  • 3,0002024
  • 1,0002025

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
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

Species stocked here

Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.

Nearest lakes