Halfmoon Lake fishing

Fishing at Halfmoon Lake has Largemouth Bass and Brook Trout on the stocking report. It is stocked about 0.7 times a year since 2011, most often in May and July. Species guides list dawn and dusk for Largemouth Bass and dawn, day, and dusk for Brook Trout.

Last stocked

May 8, 2026

Plants on record

11

Since 2011

Species recorded

2

Average size

2.7 in

Elevation

3,268.8 ft

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How Halfmoon Lake is stocked

The first plant of the year usually falls in the fourth week of May. In 2026 it was May 8, 2026, earlier than usual.

No plants recorded in 2012, 2013, 2014, 2023, and 2024.

Fish at Halfmoon Lake

Fishing Halfmoon Lake is most likely to be for Brook Trout. Brook Trout accounts for 10 of 11 plants on record, ahead of Largemouth Bass.

Around the dates Halfmoon Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 51.5°F in May, 67.8°F in July, 40°F in April, 59.3°F in June. That is air temperature at these coordinates, not water temperature. Open-Meteo

Brook Trout 10 plants
Plants
10 of 11
Last stocked
May 8, 2026
Average length
2.8 in

Seasons and rigs are on the Brook Trout guide.

Largemouth Bass 1 plant
Plants
1 of 11
Last stocked
July 27, 2011
Average length
1.5 in

Seasons and rigs are on the Largemouth Bass guide.

Fish stocked per year

  • 5,5002011
  • 5,0052015
  • 5,5002016
  • 5,0002017
  • 5,0002018
  • 3,5002019
  • 3,9502020
  • 3,6002021
  • 4,0002022
  • 4,0002025
  • 4,4352026

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 8, 2026 Brook Trout 4,435 3.64 in report
April 27, 2025 Brook Trout 4,000 2.96 in report
May 25, 2022 Brook Trout 4,000 2.23 in report
May 19, 2021 Brook Trout 3,600 2.75 in report
July 13, 2020 Brook Trout 3,950 3 in report
May 20, 2019 Brook Trout 3,500 2.5 in report
June 28, 2018 Brook Trout 5,000 5 in report
May 1, 2017 Brook Trout 5,000 2.43 in report
May 12, 2016 Brook Trout 5,500 1.97 in report
May 26, 2015 Brook Trout 5,005 2 in report
July 27, 2011 Largemouth Bass 5,500 1.5 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.

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